Fix import activity stack

app/Http/Controllers/ActivityController.php

@@ -467,6 +467,7 @@ class ActivityController extends Controller
 			}
 
 			$activity->parent_id = $activityStack[count($activityStack) - 1]->id ?? null;
+      array_push($activityStack, $activity);
 			// there should be better way to except / filter attribute level before save because it's cause error
 			// cant use except() / filter() on $activity collection somehow
 			unset($activity->level);