Well yes, that was what I meant by “miscommunication”. Either the agent and flatmate didn’t understand whether or not they had the okay to enter the room, because OP went straight to work without informing said flatmate, or they Needed OP out of the room and OP was unaware. Not an “asshole” move, but certainly more ambiguous than they could have been about it.

I fully believe with better communication that either OP would have held off on taking a work call, because the agent couldn’t enter with them in there, or they would have come in the room even while OP was working.

NTA, but it sounds like you could’ve explained to your flatmate ahead of time that you needed to work and couldn’t be disturbed. Your behavior should not have been a surprise.

not counting ATB is kinda dishonest, though, IMO. It’s still turn-based, they just decoupled the turns. IG you could argue that it was “real time” in that you can wait and enemies will continue attacking, but you still have to wait for your turn to move and can’t move and attack freely, in almost every case