I have no idea how to explain this. These two screenshots were taken a few minutes apart, absolutely no changes to anything between them. Both are on the very first turn of the fight. Both times, zero actions taken on my part, as witnessed by the fact that CB has no debuffs and no damage, and turn count is 1.

How is it possible that in the first one, my Corpse Collector is first (as she should be, since she's the fastest of my champs), and in the second, Brogni is first (which is messed up, since he's my slowest champ)?

i

i