Bug: Creating and accepting a contact with empty reference will freeze the CCP

I noticed that one can create a task contact (I'm using boto3) with a reference with an empty string as the value. This is fine in my opinion. However, as soon as an agent accepts this contact, this will freeze the CCP and the agent will only see a white screen. The only way I found to fix this is to call stop-contact twice (once to end the task and once to get it out of ACW).

Is this a known bug? Is there another way to fix such broken contacts using the connect web GUI?