There's a certain bugs that occurs in missions where you will try walk through a door, the doors will open but there will be a transparant blackness covering the way through which prevents anyone walking through. This only seems to happen with one of the rooms, and that is the room with 3 doors, rows of grey benches across it and a table at the front. The blackness seems to appear when you first open a door into that room and lasts about 10-15 seconds before disappearing. You can then walk through the doors as normal.

Anyone else experienced this?

I know it isn't just me because it stopped everyone in my team.