I just tested this on the testserver, once with a riflespy against firemobs and once against launchers with apu.
It seems to me, that the clipping fix just unfixed the enemies from the ground. I was standing out of range and took damage more and more, while cannot hit (rifle) or cast (apu) anything. The enemy won't move either, as I suppose it might be stuck in or under the terrain on the serverside.
If trying to rightclick the enemy, it will shout that the target is out of range.