"The task could not be created" error notification always appear when starting a task on multiple events

Steps to reproduce:
1. Go to Recordings->Events
2. Select more than one event
3. Start a task using Actions->Start Task

Actual Results:
The error notification "the task could not be created" appears even if all tasks have been created correctly.

Expected Results:
The error notification should only appear in case of an error

Additional note:
To make it even worse, that error notification also appear on all pages again after the user has closed it (pressed on the X)

Workaround (if any):
Ignore the error notification