Mobs stuck in walls and other objects during Master Expeditions

This is a recurring and extremely annoying issue in many of the ME maps. At least 1 mob will get stuck inside a wall, a door, or some other map feature and the party is unable to open a door or bust down the tunnel boards as a result. Occasionally, you can back off to reset aggro, but usually the entire party has to kill self to get the mob to reset.
The worst map is the one where you have to turn left to cross the long bridge, then bust down the boards to the left of the large unusable door. I'd say this bug occurs about 80% of the time on this particular map. Very annoying and time consuming to have to kill self and trudge from the beginning. Mobs also have a tendency to get stuck inside open doors.