Note: I am not talking about the multiplayer pause-lock bug. This is a separate issue on which a Google search has yielded nothing for me.
I just started a multiplayer run with one other player on the newest Steam version (126.96.36.199) without SoD. Encountered the first assassin in Candlekeep, finished the dialogue, game successfully autopaused upon him turning hostile.
I proceeded to ignore the screen to talk to my buddy, until suddenly my character was dead. Turns out the assassin kept attacking even though the game was paused for both me and my friend (as in, grayed out, no animations, no movement).
Is this a bug other people have encountered? This is the first time I've tried multiplayer since the EE came out, but I do not remember that ever happening back in the old days.
In case it matters, we both have permission to pause/unpause the game, and pausing/unpausing manually works just fine.
Sadly (or luckily), we have not been able to reproduce this consistently with other enemies. It just happens from time to time.