It's been a while since I last had this bug. What basically happens is that an entity dies mid animation and then never quite dies really. It just is there in an endless animation loop providing line of sight for the enemy and every friendly unit will always open fire on it all the time. So fighting around that spot becomes a micro nightmare since you constantly have to focus fire other squads that you can actually kill.
Unfortunately the replay contains some heavy language from the gentleman on the other team for whom I'd like to apologise in advance.
Replay
The scene in question is at around 1:02:00. Keep an eye on the eastern VP and you'll see a commando squad die but one model remaining and being stuck in a, what I can only asume is a showering, animation, which would be quite hilarious if it wasn't for the rather gamebreaking gameplay implication of that immortal entity.
I hope this helps to finally get this fixed. It's been around for quite some time now and this is about the 4th time I had it happen. Only this time it didn't completely lose us the game like in other games when it happened in the middle of the map or another area that is just unavoidable.