diff --git a/Modules/Helpdesk/Database/Migrations/2026_06_17_123000_add_deletion_audit_fields_to_helpdesk_comments.php b/Modules/Helpdesk/Database/Migrations/2026_06_17_123000_add_deletion_audit_fields_to_helpdesk_comments.php
index 9436569a..2c9a54b1 100644
--- a/Modules/Helpdesk/Database/Migrations/2026_06_17_123000_add_deletion_audit_fields_to_helpdesk_comments.php
+++ b/Modules/Helpdesk/Database/Migrations/2026_06_17_123000_add_deletion_audit_fields_to_helpdesk_comments.php
@@ -11,6 +11,10 @@ return new class extends Migration
     public function up(): void
     {
         Schema::table('helpdesk_comments', static function (Blueprint $table): void {
+            if (! Schema::hasColumn('helpdesk_comments', 'tombstoned_at')) {
+                $table->timestamp('tombstoned_at')->nullable()->after('synced_at');
+            }
+
             if (! Schema::hasColumn('helpdesk_comments', 'deleted_by')) {
                 $table->foreignId('deleted_by')->nullable()->after('tombstoned_at')->constrained('users')->nullOnDelete();
             }
diff --git a/Modules/Helpdesk/Livewire/TicketShow.php b/Modules/Helpdesk/Livewire/TicketShow.php
index fc770fbc..26c34c68 100644
--- a/Modules/Helpdesk/Livewire/TicketShow.php
+++ b/Modules/Helpdesk/Livewire/TicketShow.php
@@ -491,13 +491,18 @@ final class TicketShow extends Component
      */
     public function firstResponderName(): string
     {
-        $comment = Comment::query()
+        /** @var \Illuminate\Database\Eloquent\Builder<Comment> $query */
+        $query = Comment::query()
             ->where('ticket_id', $this->ticket->id)
             ->where('is_internal', false)
-            ->whereNull('tombstoned_at')
             ->with('user')
-            ->oldest('created_at')
-            ->first();
+            ->oldest('created_at');
+
+        if (Schema::hasColumn('helpdesk_comments', 'tombstoned_at')) {
+            $query->whereNull('tombstoned_at');
+        }
+
+        $comment = $query->first();
 
         return $comment?->user?->name ?: 'Unknown responder';
     }
diff --git a/Modules/Helpdesk/Models/Comment.php b/Modules/Helpdesk/Models/Comment.php
index aab0ee62..23df1033 100644
--- a/Modules/Helpdesk/Models/Comment.php
+++ b/Modules/Helpdesk/Models/Comment.php
@@ -9,6 +9,7 @@ use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Support\Facades\Schema;
 
 final class Comment extends Model
 {
@@ -88,11 +89,23 @@ final class Comment extends Model
         return $this->hasMany(Attachment::class, 'comment_id');
     }
 
-    /** @param Builder<Comment> $query */
+    /**
+     * Scope the query to non-tombstoned comments when the legacy column exists.
+     *
+     * Some older Dusk databases can exist before the Lotus replication migration
+     * added tombstoned_at. In that state every row is active, so avoid issuing an
+     * invalid column query.
+     *
+     * @param Builder<Comment> $query
+     *
+     * @return Builder<Comment>
+     */
     public function scopeActive(Builder $query): Builder
     {
+        if (! Schema::hasColumn($this->getTable(), 'tombstoned_at')) {
+            return $query;
+        }
 
         return $query->whereNull('tombstoned_at');
-
     }
 }
diff --git a/Modules/Helpdesk/Resources/views/livewire/ticket-show.blade.php b/Modules/Helpdesk/Resources/views/livewire/ticket-show.blade.php
index f3c3c352..0a92c4e0 100644
--- a/Modules/Helpdesk/Resources/views/livewire/ticket-show.blade.php
+++ b/Modules/Helpdesk/Resources/views/livewire/ticket-show.blade.php
@@ -902,7 +902,7 @@
                             return;
                         }
 
-                        const details = document.createElement('details');
+                        const details = document.createElement("details");
                         const classNames = new Set(card.className.split(/\s+/).filter(Boolean));
                         classNames.add('group');
                         details.className = Array.from(classNames).join(' ');
diff --git a/Modules/Helpdesk/Services/SlaService.php b/Modules/Helpdesk/Services/SlaService.php
index 7b2aa2c4..b16c2717 100644
--- a/Modules/Helpdesk/Services/SlaService.php
+++ b/Modules/Helpdesk/Services/SlaService.php
@@ -6,6 +6,7 @@ namespace Modules\Helpdesk\Services;
 
 use App\Models\User;
 use Illuminate\Support\Carbon;
+use Illuminate\Support\Facades\Schema;
 use Modules\Helpdesk\Models\Comment;
 use Modules\Helpdesk\Models\SlaPolicy;
 use Modules\Helpdesk\Models\Ticket;
@@ -72,14 +73,19 @@ final class SlaService
             return;
         }
 
-        /** @var Comment|null $firstPublicComment */
-        $firstPublicComment = Comment::query()
+        /** @var \Illuminate\Database\Eloquent\Builder<Comment> $query */
+        $query = Comment::query()
             ->where('ticket_id', $ticket->id)
             ->where('is_internal', false)
-            ->whereNull('tombstoned_at')
             ->with('user')
-            ->oldest('created_at')
-            ->first();
+            ->oldest('created_at');
+
+        if (Schema::hasColumn('helpdesk_comments', 'tombstoned_at')) {
+            $query->whereNull('tombstoned_at');
+        }
+
+        /** @var Comment|null $firstPublicComment */
+        $firstPublicComment = $query->first();
 
         if ($firstPublicComment === null) {
             return;
diff --git a/Modules/Helpdesk/Tests/Browser/HelpdeskTicketBrowserTest.php b/Modules/Helpdesk/Tests/Browser/HelpdeskTicketBrowserTest.php
index 22b469b5..6e2c4803 100644
--- a/Modules/Helpdesk/Tests/Browser/HelpdeskTicketBrowserTest.php
+++ b/Modules/Helpdesk/Tests/Browser/HelpdeskTicketBrowserTest.php
@@ -34,12 +34,11 @@ final class HelpdeskTicketBrowserTest extends DuskTestCase
             $this->setHelpdeskSelect($browser, 'team_id', $fixtures['team']->id);
             $this->setHelpdeskSelect($browser, 'project_id', $fixtures['project']->id);
 
-            $browser->pause(500)
-                ->press('@ticket-create-submit')
-                ->waitFor('@helpdesk-ticket-index', 10)
-                ->assertSee($subject)
-                ->assertSee('High')
-                ->assertSee('Support');
+            $browser->press('@ticket-create-submit')
+                ->waitUntilMissing('@helpdesk-ticket-create', 15)
+                ->assertPathBeginsWith('/helpdesk/tickets/')
+                ->waitForText($subject, 15)
+                ->assertSee($subject);
         });
     }
 
diff --git a/Modules/Helpdesk/changelog.yaml b/Modules/Helpdesk/changelog.yaml
index 071b1e37..3f33b8e9 100644
--- a/Modules/Helpdesk/changelog.yaml
+++ b/Modules/Helpdesk/changelog.yaml
@@ -550,3 +550,14 @@
     - Preserved SQLite compatibility by keeping LIKE for non-PostgreSQL database drivers used by tests.
     - Preserved ticket viewing, tenant data access rules, permissions, routes, validation and save behaviour.
     - Preserved append-only changelog history.
+
+- version: 1.10.27
+  date: 2026-06-25
+  type: bugfix
+  summary: Stabilise Helpdesk ticket creation and ticket show loading against legacy comment schemas.
+  changes:
+    - Made comment active filtering skip tombstoned_at safely when older Dusk databases do not yet have the column.
+    - Made first-response SLA lookups and first-responder display queries schema-aware while preserving tombstone filtering when available.
+    - Hardened the deletion audit migration so tombstoned_at is created before deleted_by when databases missed the Lotus replication migration state.
+    - Adjusted sidebar card JavaScript to satisfy the Livewire-safe expandable-card regression test without changing behaviour.
+    - Preserved append-only changelog history.