if I turn on auto turn ending, I sometimes have an infinite loop of turn ending until I go into menu and turn off that option.
to trigger it I have 2 ungarrisoned armies, I set one to explore (a ship), and send the rest into a town (my chaneller and his retinue, they were 1 step away from the town). the game then skips turns rapidly non-stop... taking the chaneller out of the town somehow doesn't stop it, only way to stop it is to go into the menu and turn off auto-turn.