I’m now 100% sure, that when I’m downed as my Engineer, I’m unable to target mobs periodically. No clue what makes them untargetable. It is often enough of a bug to cost me.
You also can’t target anything to your side or behind you. If you fall while the enemy mobs are behind you, you just sit there until dying. The engineer will not turn to attack. It does nothing.
Another bug while downed is not doing damage to targets. Their health is locked at a certain amount, and there is no way to rally (even though it is obvious I should have).
The third bug is killing an enemy, and not rallying. You have them targeted, you finished them off, and you’re still laying on the ground.
Playing Devil’s Advocate since 1990.