I was in the fight against the Hermit and several Obsidian Golems. All Golems used their Imprison-ability in their first turn. During the second turn for the Golems, the combat stopped. It seemed like the AI wanted to do something, but was prevented from doing it. The only way to finish the combat was to auto-resolve.
Here is a save right before the battle.
The same thing happened again later in a fight against an Earth Elemental and two Golems. The Earth Elemental used Hurl Boulder during its first turn and got stuck during its second turn.
Edit: Also, Imprison never did any damage to my champions.
