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Yes, that happened to me on mod 3.46 on Mininoстальгия. I passed the turn and stepped away from the computer for a while, and the computer attacked and killed my hero in the castle. Since I wasn't near the computer, the quick battle option didn't ask me if I wanted to replay the battle manually.
Quick battle waits, but not for long... about 5-10 seconds.
I saw one of the strong players disable auto-battle when they finished their turn, probably for this very reason.