Heavy enemies stay active if downed while mission ends

If a heavy enemy is uncapped and still in the stun animation as the mission ends, they will get back up and continue their normal behavior (moving and shooting) while the players are looking at the mission complete screen. No gameplay consequences because you’re invincible after the mission ends, but the loud shotgun sounds are very annoying.

I have not tested whether this is the case for other stunned enemies as well (such as by flashbang).