diff --git a/application/controllers/IncidentController.php b/application/controllers/IncidentController.php
index d529691e1..b6695aa2d 100644
--- a/application/controllers/IncidentController.php
+++ b/application/controllers/IncidentController.php
@@ -27,6 +27,7 @@ public function indexAction(): void
 
         $query = Incident::on(Database::get())
             ->with(['object', 'object.source'])
+            ->withColumns('object.id_tags')
             ->filter(Filter::equal('incident.id', $id));
 
         $this->applyRestrictions($query);
diff --git a/application/controllers/IncidentsController.php b/application/controllers/IncidentsController.php
index 93a42a4bf..082a4f6a5 100644
--- a/application/controllers/IncidentsController.php
+++ b/application/controllers/IncidentsController.php
@@ -29,7 +29,8 @@ public function indexAction(): void
         $this->addTitleTab(t('Incidents'));
 
         $incidents = Incident::on(Database::get())
-            ->with('object');
+            ->with('object')
+            ->withColumns('object.id_tags');
 
         $limitControl = $this->createLimitControl();
         $sortControl = $this->createSortControl(
diff --git a/library/Notifications/Model/Incident.php b/library/Notifications/Model/Incident.php
index acb5f64e4..0cff661ec 100644
--- a/library/Notifications/Model/Incident.php
+++ b/library/Notifications/Model/Incident.php
@@ -4,11 +4,15 @@
 
 namespace Icinga\Module\Notifications\Model;
 
+use Icinga\Module\Notifications\Common\Database;
 use ipl\Orm\Behavior\Binary;
 use ipl\Orm\Behavior\MillisecondTimestamp;
 use ipl\Orm\Behaviors;
 use ipl\Orm\Model;
+use ipl\Orm\Query;
 use ipl\Orm\Relations;
+use ipl\Sql\Connection;
+use ipl\Sql\Select;
 
 class Incident extends Model
 {
@@ -52,6 +56,19 @@ public function getDefaultSort()
         return ['incident.severity desc, incident.started_at'];
     }
 
+    public static function on(Connection $db)
+    {
+        $query = parent::on($db);
+
+        $query->on(Query::ON_SELECT_ASSEMBLED, function (Select $select) use ($query) {
+            if (isset($query->getUtilize()['incident.object.object_id_tag'])) {
+                Database::registerGroupBy($query, $select);
+            }
+        });
+
+        return $query;
+    }
+
     public function createBehaviors(Behaviors $behaviors)
     {
         $behaviors->add(new Binary(['object_id']));
diff --git a/library/Notifications/Widget/Detail/IncidentDetail.php b/library/Notifications/Widget/Detail/IncidentDetail.php
index c3dba4a47..010239319 100644
--- a/library/Notifications/Widget/Detail/IncidentDetail.php
+++ b/library/Notifications/Widget/Detail/IncidentDetail.php
@@ -7,7 +7,6 @@
 use Icinga\Module\Notifications\Common\Database;
 use Icinga\Module\Notifications\Model\Incident;
 use Icinga\Module\Notifications\Model\Objects;
-use Icinga\Module\Notifications\Model\Source;
 use Icinga\Module\Notifications\Widget\EventSourceBadge;
 use Icinga\Module\Notifications\Widget\ItemList\IncidentContactList;
 use Icinga\Module\Notifications\Widget\ItemList\IncidentHistoryList;
@@ -16,7 +15,8 @@
 use ipl\Html\Html;
 use ipl\Html\HtmlElement;
 use ipl\Html\Table;
-use ipl\Stdlib\Filter;
+use ipl\Orm\Query;
+use ipl\Sql\Select;
 use ipl\Web\Widget\Link;
 use ipl\Web\Widget\StateBall;
 
@@ -93,22 +93,28 @@ protected function createRelatedObject()
 
     protected function createHistory()
     {
+        $history = $this->incident->incident_history
+            ->with([
+                'event',
+                'event.object',
+                'event.object.source',
+                'contact',
+                'rule',
+                'rule_escalation',
+                'contactgroup',
+                'schedule',
+                'channel'
+            ]);
+
+        $history
+            ->withColumns('event.object.id_tags')
+            ->on(Query::ON_SELECT_ASSEMBLED, function (Select $select) use ($history) {
+                Database::registerGroupBy($history, $select);
+            });
+
         return [
             Html::tag('h2', t('Incident History')),
-            new IncidentHistoryList(
-                $this->incident->incident_history
-                    ->with([
-                        'event',
-                        'event.object',
-                        'event.object.source',
-                        'contact',
-                        'rule',
-                        'rule_escalation',
-                        'contactgroup',
-                        'schedule',
-                        'channel'
-                    ])
-            )
+            new IncidentHistoryList($history)
         ];
     }