I noticed several progress problems with NPCs getting stuck behind doors.

The final battle after the rooftop on the first mission, both story and hard difficulty, there was what appeared to be an enemy behind the door. Using the minigun or going up with a shotgun we were able to kill (reduce the health bar).

Perhaps the intent was to make this the life of the DOOR, if so, that's not standard division UI and there needs to be a new

I noticed the same issue in a landmark in the DZ.