diff --git a/library/Notifications/Common/Icons.php b/library/Notifications/Common/Icons.php
index 5a7a4d220..d63fecad2 100644
--- a/library/Notifications/Common/Icons.php
+++ b/library/Notifications/Common/Icons.php
@@ -39,4 +39,6 @@ private function __construct()
     public const NOTIFIED = 'paper-plane';
 
     public const RULE_MATCHED = 'filter';
+
+    public const UNDEFINED = 'notdef';
 }
diff --git a/library/Notifications/Widget/Detail/IncidentDetail.php b/library/Notifications/Widget/Detail/IncidentDetail.php
index 010239319..9780ad284 100644
--- a/library/Notifications/Widget/Detail/IncidentDetail.php
+++ b/library/Notifications/Widget/Detail/IncidentDetail.php
@@ -4,7 +4,6 @@
 
 namespace Icinga\Module\Notifications\Widget\Detail;
 
-use Icinga\Module\Notifications\Common\Database;
 use Icinga\Module\Notifications\Model\Incident;
 use Icinga\Module\Notifications\Model\Objects;
 use Icinga\Module\Notifications\Widget\EventSourceBadge;
@@ -15,8 +14,6 @@
 use ipl\Html\Html;
 use ipl\Html\HtmlElement;
 use ipl\Html\Table;
-use ipl\Orm\Query;
-use ipl\Sql\Select;
 use ipl\Web\Widget\Link;
 use ipl\Web\Widget\StateBall;
 
@@ -93,28 +90,22 @@ 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, $select);
-            });
-
         return [
             Html::tag('h2', t('Incident History')),
-            new IncidentHistoryList($history)
+            new IncidentHistoryList(
+                $this->incident->incident_history
+                    ->with([
+                        'event',
+                        'event.object',
+                        'event.object.source',
+                        'contact',
+                        'rule',
+                        'rule_escalation',
+                        'contactgroup',
+                        'schedule',
+                        'channel'
+                    ])
+            )
         ];
     }
 
diff --git a/library/Notifications/Widget/IconBall.php b/library/Notifications/Widget/IconBall.php
index 08b5af957..41cfa15da 100644
--- a/library/Notifications/Widget/IconBall.php
+++ b/library/Notifications/Widget/IconBall.php
@@ -13,7 +13,7 @@ class IconBall extends BaseHtmlElement
 
     protected $defaultAttributes = ['class' => ['icon-ball']];
 
-    public function __construct(string $name, ?string $style = null)
+    public function __construct(string $name, ?string $style = 'fa-solid')
     {
         $icon = new Icon($name);
         if ($style !== null) {
diff --git a/library/Notifications/Widget/ItemList/IncidentHistoryListItem.php b/library/Notifications/Widget/ItemList/IncidentHistoryListItem.php
index 1e8b6e7de..69a6ca24b 100644
--- a/library/Notifications/Widget/ItemList/IncidentHistoryListItem.php
+++ b/library/Notifications/Widget/ItemList/IncidentHistoryListItem.php
@@ -28,29 +28,10 @@ class IncidentHistoryListItem extends BaseListItem
     protected function assembleVisual(BaseHtmlElement $visual): void
     {
         $incidentIcon = $this->getIncidentEventIcon();
-        if ($incidentIcon === '') {
-            $content = new IconBall('ellipsis', 'fa-solid');
+        if ($this->item->type === 'incident_severity_changed') {
+            $content = new Icon($incidentIcon, ['class' => 'severity-' . $this->item->new_severity]);
         } else {
-            switch ($this->item->type) {
-                case 'incident_severity_changed':
-                    $content = new Icon($incidentIcon, ['class' => 'severity-' . $this->item->new_severity]);
-
-                    break;
-                case 'rule_matched':
-                case 'opened':
-                case 'closed':
-                    $content = new IconBall($incidentIcon);
-
-                    break;
-                case 'notified':
-                case 'escalation_triggered':
-                case 'recipient_role_changed':
-                    $content = new IconBall($incidentIcon, 'fa-solid');
-
-                    break;
-                default:
-                    $content = new IconBall('ellipsis', 'fa-solid');
-            }
+            $content = new IconBall($incidentIcon);
         }
 
         $visual->addHtml($content);
@@ -93,8 +74,10 @@ protected function getIncidentEventIcon(): string
                 return Icons::RULE_MATCHED;
             case 'escalation_triggered':
                 return Icons::TRIGGERED;
-            default:
+            case 'notified':
                 return Icons::NOTIFIED;
+            default:
+                return Icons::UNDEFINED;
         }
     }
 
@@ -103,12 +86,14 @@ protected function getSeverityIcon(): string
         switch ($this->item->new_severity) {
             case 'ok':
                 return Icons::OK;
+            case 'warning':
+                return Icons::WARNING;
             case 'err':
                 return Icons::ERROR;
             case 'crit':
                 return Icons::CRITICAL;
             default:
-                return Icons::WARNING;
+                return Icons::UNDEFINED;
         }
     }
 
@@ -128,7 +113,7 @@ protected function getRoleIcon(): string
                     }
                 }
 
-                return '';
+                return Icons::UNDEFINED;
         }
     }
 
diff --git a/public/css/common.less b/public/css/common.less
index 242369c45..6924c3063 100644
--- a/public/css/common.less
+++ b/public/css/common.less
@@ -54,11 +54,11 @@
     margin-top: 0.15em;
   }
 
-  i.icon:before {
+  i.icon::before {
     font-size: 0.6em;
   }
 
-  i.icon.fa-paper-plane:before {
+  i.icon.fa-paper-plane::before {
     margin-right: .2em;
   }
 }