This has happened to me 4 times in a row now. I try to move as slowly and carefully as possible, memorizing the layout, checking every room and corner, using wedges to avoid the big open areas and such. But the moment I put a single step inside a room that I ALREADY cleared, with ALL of my team ALREADY inside it, I immediately die with fuck ass warnings, not even seeing any suspect, hearing a shot being fired or an explosion going off, and I'm using heavy ceramic armor, mind you.
I'm in my 10th attempt and seriously considering quitting the game at this point, since it doesn't even let me progress to the later levels without clearing this terrible one first. I expected a SWAT-like experience but instead I'm apparently getting insta killed from a terrorist trickshotting me from across the map like it's Call of Duty, this AI is so bullshit man.