diff --git a/src/webui/www/private/views/log.html b/src/webui/www/private/views/log.html
index 6590f0ef5d94..2e2ff8510a0e 100644
--- a/src/webui/www/private/views/log.html
+++ b/src/webui/www/private/views/log.html
@@ -188,8 +188,10 @@
         let selectedLogLevels = JSON.parse(LocalPreferences.get("qbt_selected_log_levels")) || ["1", "2", "4", "8"];
 
         const init = () => {
-            for (const option of $("logLevelSelect").options)
-                option.setAttribute("selected", selectedLogLevels.includes(option.value));
+            for (const option of $("logLevelSelect").options) {
+                if (selectedLogLevels.includes(option.value))  // set `false` will break the UI
+                    option.setAttribute("selected", true);
+            }
 
             selectBox = new vanillaSelectBox("#logLevelSelect", {
                 maxHeight: 200,