frontend/src/app/dashboard/task-overview/task-overview.component.ts

@@ -41,6 +41,7 @@ export class TaskOverviewComponent {
     this.taskService.tasksTaskIDFinishPost(task.taskID).subscribe({
       next: resp => {
         this.finishedEmitter.emit(task);
+        this.tasks = this.tasks.filter(ct => ct.taskID !== task.taskID)
       },
       error: err => {
         if(err.status == 403) {