diff --git a/CHANGELOG.md b/CHANGELOG.md
index 547321e14..aa666ca58 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,18 @@
+## [3.19.3](https://github.com/kevinchappell/formBuilder/compare/v3.19.2...v3.19.3) (2024-03-01)
+
+
+### Bug Fixes
+
+* ensure that config is per instance of formBuilder ([c44dbc4](https://github.com/kevinchappell/formBuilder/commit/c44dbc46fd757cffeef96c3b7752d5749d712237))
+* selecting last field id when running in advanced bootstrap mode ([8153745](https://github.com/kevinchappell/formBuilder/commit/8153745f73e1dea2d599bdcfdf762930e2290a26))
+
+## [3.19.2](https://github.com/kevinchappell/formBuilder/compare/v3.19.1...v3.19.2) (2024-03-01)
+
+
+### Bug Fixes
+
+* provide the value for a number attribute in the tUA array ([76db433](https://github.com/kevinchappell/formBuilder/commit/76db4331a648a926fb963de2e90ca1a0eeaa22f5))
+
 ## [3.19.1](https://github.com/kevinchappell/formBuilder/compare/v3.19.0...v3.19.1) (2024-02-09)
 
 
diff --git a/package-lock.json b/package-lock.json
index 3f32e201f..5aa11a377 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "formBuilder",
-  "version": "3.19.1",
+  "version": "3.19.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "formBuilder",
-      "version": "3.19.1",
+      "version": "3.19.3",
       "license": "MIT",
       "dependencies": {
         "jquery": ">=3.4.1",
diff --git a/package.json b/package.json
index f540ce956..8e8292d80 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "formBuilder",
-  "version": "3.19.1",
+  "version": "3.19.3",
   "main": "dist/form-builder.min.js",
   "homepage": "https://formbuilder.online/",
   "repository": {
diff --git a/src/js/config.js b/src/js/config.js
index e65d728a1..63b8b93db 100644
--- a/src/js/config.js
+++ b/src/js/config.js
@@ -106,7 +106,7 @@ export const defaultI18n = {
   location: 'assets/lang/',
 }
 
-export const config = {}
+export const instanceConfig = {}
 
 export const gridClassNames = {
   rowWrapperClass: 'rowWrapper',
diff --git a/src/js/form-builder.js b/src/js/form-builder.js
index 599c433f5..a0eba09c8 100644
--- a/src/js/form-builder.js
+++ b/src/js/form-builder.js
@@ -10,7 +10,7 @@ import Helpers from './helpers'
 import {
   defaultOptions,
   defaultI18n,
-  config,
+  instanceConfig,
   styles,
   gridClassNames,
   defaultTimeout,
@@ -33,7 +33,7 @@ import {
   safename,
   forceNumber,
   getContentType,
-  generateSelectorClassNames,
+  generateSelectorClassNames, firstNumberOrUndefined,
 } from './utils'
 import { attributeWillClobber, setElementContent, setSanitizerConfig } from './sanitizer'
 import fontConfig from '../fonts/config.json'
@@ -55,6 +55,7 @@ function FormBuilder(opts, element, $) {
   const formID = `frmb-${Date.now()}`
   const data = new Data(formID)
   const d = new Dom(formID)
+  const config = instanceConfig[formID] = {}
 
   /** @var formRows Allocated rows IDs in the builder */
   let formRows = []
@@ -701,8 +702,16 @@ function FormBuilder(opts, element, $) {
         if (attrValType !== 'undefined') {
           const orig = mi18n.get(attribute)
           const tUA = typeUserAttr[attribute]
-          const origValue = attrValType === 'boolean' ? tUA.value : (tUA.value || '')
-          tUA.value = values[attribute] || origValue
+          let origValue = tUA.value
+          if (attrValType === 'boolean') {
+            origValue = tUA.value
+            tUA[attribute] ??= tUA.value
+          } else if (attrValType === 'number') {
+            tUA[attribute] ??= firstNumberOrUndefined(values[attribute], origValue)
+          } else {
+            origValue ??= ''
+            tUA[attribute] ??= values[attribute] || origValue
+          }
 
           if (tUA.label) {
             i18n[attribute] = Array.isArray(tUA.label) ? mi18n.get(...tUA.label) || tUA.label[0] : tUA.label
@@ -890,7 +899,7 @@ function FormBuilder(opts, element, $) {
    */
   const numberAttribute = (attribute, values) => {
     const { class: classname, className, ...attrs } = values
-    const attrVal = (isNaN(attrs[attribute])) ? undefined : attrs[attribute]
+    const attrVal = (Number.isNaN(attrs[attribute])) ? undefined : attrs[attribute]
     const attrLabel = mi18n.get(attribute) || attribute
     const placeholder = mi18n.get(`placeholder.${attribute}`)
 
@@ -2486,7 +2495,6 @@ function FormBuilder(opts, element, $) {
 const pluginInit = function(options,elem) {
   const _this = this
   const { i18n, ...opts } = jQuery.extend({}, defaultOptions, options, true)
-  config.opts = opts
   this.i18nOpts = jQuery.extend({}, defaultI18n, i18n, true)
 
   const notInitialised = () => {
diff --git a/src/js/helpers.js b/src/js/helpers.js
index 9a6f55afb..5228c23fd 100644
--- a/src/js/helpers.js
+++ b/src/js/helpers.js
@@ -18,7 +18,7 @@ import {
   getAllGridRelatedClasses,
 } from './utils'
 import events from './events'
-import { config, defaultTimeout, styles } from './config'
+import { instanceConfig, defaultTimeout, styles } from './config'
 import control from './control'
 import storageAvailable from 'storage-available'
 
@@ -35,6 +35,7 @@ export default class Helpers {
   constructor(formId, layout, formBuilder) {
     this.data = instanceData[formId]
     this.d = instanceDom[formId]
+    this.config = instanceConfig[formId]
     this.doCancel = false
     this.layout = layout
     this.handleKeyDown = this.handleKeyDown.bind(this)
@@ -82,7 +83,7 @@ export default class Helpers {
    */
   beforeStop(event, ui) {
     const _this = this
-    const opts = config.opts
+    const opts = this.config.opts
     const form = _this.d.stage
     const lastIndex = form.childNodes.length - 1
     const cancelArray = []
@@ -196,6 +197,7 @@ export default class Helpers {
     const formData = []
     const d = this.d
     const _this = this
+    const config = this.config
 
     if (form.childNodes.length !== 0) {
       const fields = []
@@ -302,7 +304,7 @@ export default class Helpers {
     const data = this.data
 
     if (!formData) {
-      formData = config.opts.formData
+      formData = this.config.opts.formData
     }
 
     if (!formData) {
@@ -319,7 +321,7 @@ export default class Helpers {
       },
     }
 
-    data.formData = setData[config.opts.dataType](formData) || []
+    data.formData = setData[this.config.opts.dataType](formData) || []
 
     return data.formData
   }
@@ -339,7 +341,7 @@ export default class Helpers {
     }
 
     // save action for current `dataType`
-    data.formData = doSave[config.opts.dataType](minify)
+    data.formData = doSave[this.config.opts.dataType](minify)
 
     // trigger formSaved event
     document.dispatchEvent(events.formSaved)
@@ -365,6 +367,7 @@ export default class Helpers {
    * @return {Object} fieldData
    */
   getAttrVals(field) {
+    const config = this.config
     const fieldData = Object.create(null)
     const attrs = field.querySelectorAll('[class*="fld-"]')
     forEach(attrs, index => {
@@ -651,6 +654,7 @@ export default class Helpers {
    */
   confirmRemoveAll(e) {
     const _this = this
+    const config = this.config
     const formID = e.target.id.match(/frmb-\d{13}/)[0]
     const stage = document.getElementById(formID)
     const i18n = mi18n.current
@@ -683,7 +687,7 @@ export default class Helpers {
 
   addDefaultFields() {
     // Load default fields if none are set
-    config.opts.defaultFields.forEach(field => this.formBuilder.prepFieldVars(field))
+    this.config.opts.defaultFields.forEach(field => this.formBuilder.prepFieldVars(field))
     this.d.stage.classList.remove('empty')
   }
 
@@ -694,7 +698,7 @@ export default class Helpers {
    */
   removeAllFields(stage) {
     const i18n = mi18n.current
-    const opts = config.opts
+    const opts = this.config.opts
     const fields = stage.querySelectorAll(this.formBuilder.fieldSelector)
     const markEmptyArray = []
 
@@ -741,7 +745,7 @@ export default class Helpers {
    * @return {Array|false} fieldOrder
    */
   setFieldOrder($cbUL) {
-    if (!config.opts.sortableControls) {
+    if (!this.config.opts.sortableControls) {
       return false
     }
     const JSON = window.JSON
@@ -839,7 +843,7 @@ export default class Helpers {
 
     this.removeContainerProtection(rowContainer.attr('id'))
 
-    config.opts.onCloseFieldEdit($editPanel[0])
+    this.config.opts.onCloseFieldEdit($editPanel[0])
     document.dispatchEvent(events.fieldEditClosed)
 
     const prevHolder = liContainer.find('.prev-holder')
@@ -909,7 +913,7 @@ export default class Helpers {
     liContainer.insertAfter(rowWrapper)
 
     this.formBuilder.currentEditPanel = $editPanel[0]
-    config.opts.onOpenFieldEdit($editPanel[0])
+    this.config.opts.onOpenFieldEdit($editPanel[0])
     document.dispatchEvent(events.fieldEditOpened)
 
     $(document).trigger('fieldOpened', [{ rowWrapperID: rowWrapper.attr('id') }])
@@ -939,10 +943,10 @@ export default class Helpers {
    * Open a dialog with the form's data
    */
   showData() {
-    const formData = escapeHtml(this.getFormData(config.opts.dataType, true))
+    const formData = escapeHtml(this.getFormData(this.config.opts.dataType, true))
 
     const code = m('code', formData, {
-      className: `formData-${config.opts.dataType}`,
+      className: `formData-${this.config.opts.dataType}`,
     })
 
     this.dialog(m('pre', code), false, 'data-dialog')
@@ -961,7 +965,7 @@ export default class Helpers {
     const fields = form.getElementsByClassName('form-field')
 
     if (!fields.length) {
-      config.opts.notify.warning('No fields to remove')
+      this.config.opts.notify.warning('No fields to remove')
       return false
     }
 
@@ -969,15 +973,15 @@ export default class Helpers {
       const availableIds = [].slice.call(fields).map(field => {
         return field.id
       })
-      config.opts.notify.warning('fieldID required to remove specific fields.')
-      config.opts.notify.warning('Removing last field since no ID was supplied.')
-      config.opts.notify.warning('Available IDs: ' + availableIds.join(', '))
-      fieldID = form.lastChild.id
+      this.config.opts.notify.warning('fieldID required to remove specific fields.')
+      this.config.opts.notify.warning('Removing last field since no ID was supplied.')
+      this.config.opts.notify.warning('Available IDs: ' + availableIds.join(', '))
+      fieldID = availableIds[availableIds.length-1]
     }
 
     const field = document.getElementById(fieldID)
     if (!field) {
-      config.opts.notify.warning('Field not found')
+      this.config.opts.notify.warning('Field not found')
       return false
     }
 
@@ -995,7 +999,7 @@ export default class Helpers {
       }
     })
 
-    const userEvents = Object.assign({}, config.opts.typeUserEvents['*'], config.opts.typeUserEvents[field.type])
+    const userEvents = Object.assign({}, this.config.opts.typeUserEvents['*'], this.config.opts.typeUserEvents[field.type])
 
     if (userEvents && userEvents.onremove) {
       userEvents.onremove(field)
@@ -1059,7 +1063,7 @@ export default class Helpers {
    * @return {Array} subtypes
    */
   processSubtypes(subtypeOpts) {
-    const disabledSubtypes = config.opts.disabledSubtypes
+    const disabledSubtypes = this.config.opts.disabledSubtypes
     // first register any passed subtype options against the appropriate type control class
     for (const fieldType in subtypeOpts) {
       if (subtypeOpts.hasOwnProperty(fieldType)) {
@@ -1136,7 +1140,7 @@ export default class Helpers {
    * @return {HTMLElement[]} formActions btn-group
    */
   formActionButtons() {
-    const opts = config.opts
+    const opts = this.config.opts
     return opts.actionButtons
       .map(btnData => {
         if (btnData.id && opts.disabledActionButtons.indexOf(btnData.id) === -1) {
@@ -1183,7 +1187,7 @@ export default class Helpers {
         events: {
           click: evt => {
             _this.save()
-            config.opts.onSave(evt, _this.data.formData)
+            _this.config.opts.onSave(evt, _this.data.formData)
           },
         },
       },
@@ -1196,8 +1200,8 @@ export default class Helpers {
       // html labels are not available using xml dataType
       opts.disableHTMLLabels = true
     }
-    config.opts = Object.assign({}, { actionButtons: mergedActionButtons }, { fieldEditContainer }, opts)
-    return config.opts
+    _this.config.opts = Object.assign({}, { actionButtons: mergedActionButtons }, { fieldEditContainer }, opts)
+    return _this.config.opts
   }
 
   /**
diff --git a/src/js/utils.js b/src/js/utils.js
index 20f19f31b..48ffa56cc 100644
--- a/src/js/utils.js
+++ b/src/js/utils.js
@@ -702,6 +702,10 @@ export function titleCase(str) {
   )
 }
 
+export function firstNumberOrUndefined(...options) {
+  return options.find(x => typeof x === 'number')
+}
+
 const utils = {
   addEventListeners,
   attrString,
@@ -733,6 +737,7 @@ const utils = {
   unique,
   validAttr,
   titleCase,
+  firstNumberOrUndefined,
 }
 
 /**
diff --git a/tests/form-builder.test.js b/tests/form-builder.test.js
index af753bb83..a0addd853 100644
--- a/tests/form-builder.test.js
+++ b/tests/form-builder.test.js
@@ -199,6 +199,38 @@ describe('FormBuilder stage names translated', () => {
   })
 })
 
+describe('FormBuilder attribute setup', () => {
+  test('number control number attributes do not inherit field value when not set', async() => {
+    const config = {}
+    const fbWrap = $('<div>')
+    const fb = await fbWrap.formBuilder(config).promise
+    fb.actions.addField({
+      type: 'number',
+      value: '5.2',
+    })
+    expect(fbWrap.find('.value-wrap input').val()).toBe('5.2')
+    expect(fbWrap.find('.min-wrap input').val()).toBe('')
+    expect(fbWrap.find('.max-wrap input').val()).toBe('')
+    expect(fbWrap.find('.step-wrap input').val()).toBe('')
+  })
+  test('number control number attributes do not inherit field value when set', async() => {
+    const config = {}
+    const fbWrap = $('<div>')
+    const fb = await fbWrap.formBuilder(config).promise
+    fb.actions.addField({
+      type: 'number',
+      value: '5.2',
+      min: 2,
+      max: 10,
+      step: 1.0,
+    })
+    expect(fbWrap.find('.value-wrap input').val()).toBe('5.2')
+    expect(fbWrap.find('.min-wrap input').val()).toBe('2')
+    expect(fbWrap.find('.max-wrap input').val()).toBe('10')
+    expect(fbWrap.find('.step-wrap input').val()).toBe('1')
+  })
+
+})
 describe('FormBuilder typeUserAttrs detection', () => {
   test('renders text/string user attribute', async () => {
     const config = {
@@ -238,6 +270,27 @@ describe('FormBuilder typeUserAttrs detection', () => {
     expect(input.is(':checked')).toBeFalsy()
   })
   test('renders number user attribute when value is number', async () => {
+    const config = {
+      typeUserAttrs: {
+        text: {
+          testAttribute: {
+            label: 'test',
+            value: 10,
+          },
+        },
+      },
+    }
+    const fbWrap = $('<div>')
+    const fb = await fbWrap.formBuilder(config).promise
+    fb.actions.addField({
+      type: 'text',
+      value: '1',
+    })
+    const input = fbWrap.find('.testAttribute-wrap input')
+    expect(input.attr('type')).toBe('number')
+    expect(input.val()).toBe('10')
+  })
+  test('renders number user attribute when value is zero', async () => {
     const config = {
       typeUserAttrs: {
         text: {
@@ -250,9 +303,13 @@ describe('FormBuilder typeUserAttrs detection', () => {
     }
     const fbWrap = $('<div>')
     const fb = await fbWrap.formBuilder(config).promise
-    fb.actions.addField({ type: 'text'})
+    fb.actions.addField({
+      type: 'text',
+      value: '1',
+    })
     const input = fbWrap.find('.testAttribute-wrap input')
     expect(input.attr('type')).toBe('number')
+    expect(input.val()).toBe('0')
   })
   test('renders select user attribute when options given', async () => {
     const config = {
diff --git a/tests/utils.test.js b/tests/utils.test.js
index a89b2708c..b1fcdf6d5 100644
--- a/tests/utils.test.js
+++ b/tests/utils.test.js
@@ -1,7 +1,7 @@
 const utils = require('./../src/js/utils.js')
 const { safeAttr, flattenArray, safeAttrName, hyphenCase, camelCase, bindEvents, attrString, nameAttr, markup,
   parsedHtml, escapeAttrs, getScripts, capitalize, addEventListeners, unique, escapeAttr, escapeHtml,
-  getAllGridRelatedClasses, subtract, safename, xmlParseAttrs, parseXML
+  getAllGridRelatedClasses, subtract, safename, xmlParseAttrs, parseXML, firstNumberOrUndefined
 } = require('../src/js/utils')
 
 describe('Test Util functions', () => {
@@ -143,6 +143,12 @@ describe('Test Util functions', () => {
     expect(subtract([2],[1,2,3])).toEqual([1,3])
     expect(subtract(['remove-me'],['classA','classB','remove-me','classC'])).toEqual(['classA','classB','classC'])
   })
+
+  test('firstNumberOrUndefined', () => {
+    expect(firstNumberOrUndefined(1)).toEqual(1)
+    expect(firstNumberOrUndefined(1,2,3)).toEqual(1)
+    expect(firstNumberOrUndefined(undefined,'',2,1)).toEqual(2)
+  })
 })
 
 describe('Test XML functions', () => {