I've noticed that when you join the battle late (resetting battle countdown), some boss cheats can start glitching. So far I have confirmed this happens for several bosses such as shane von shane in graveyard and grandfather spider. For shane the cheat that occurs when he takes no damage fires twice before round 1 leading to a round 2 monster mash if he takes no damage on round 1. For grandfather spider he will summon another minion after it dies instead of waiting a few rounds. Occurs for Malistaire in graveyard as well with his blade removal cheat but that doesn't affect gampley since it's before round 1. Also I'm not completely sure on this one but I think it also may be the cause of different players seeing different damage values occur on hits.