I had a Goblin rabblemaster in the powered cube, as well as a Containment Priest in play. My opponent used a flickerwisp on my rabblemaster, exiling it. When it was supposed to come back, my Containment Priest stopped it from coming back. However, my token was still forced to attack every combat after this happened. This doesn't normally happen after the Rabblemaster dies so I believe it's related to the Containment Priest/Flickerwisp interaction