I've seen this at various times, and finally got a pretty reliable repro here. I'm fighting the Sky Dragon, and she starts combat with a fear thing, which always crits and interrupts my low-will Wizard PC. So as soon as combat starts, before my PC can complete her first spell, the cape procs and makes her invisible. From this point onward, my character can no longer cast any spells. While the game is paused, the little action icon for a spell will go over her portrait if I tell her to cast it, but as soon as I unpause, she cancels that and goes to AI behavior. Also won't work for daily abiliti