unkillable mob

act 3 cruel matlan waterways, a small monkey that came out of one of the cages is untargetable and unkillable, he is doing damage to me like normal but i cant auto attack him and he doesnt get hit by aoe

I have a similar issue in a Tier 5 Vaal Factory Map - cannot complete the map because one of the rares is untargetable. it appears that it is stuck half way in the ground, but can move and shoot but is invincible. It also appears that it's 2 rares, since it seems unlikely that two bow shooting rares would be stacked on top of each other like this naturally. So the bug might have occurred due to the rare duplicating node I have specced into in the Atlas tree.

Same happened to me just now, monkey, same act/area too.

It's not too bothersome, just keeps activating my wind dancer buff all the time not letting it build up.

Act 3 In Waterways same f.. monkey chasing me and damaging me and I can't target it, hate monkeys...

I have an unkillable rare in Vaal Foundry Map,looks partially stuck in the ground, very similiar to the one NonStopTilted is describing, also having what seems like two bows. I also have the duplicating mod, but after clearing the rest of the map, it says 1 monster remaining, so I doubt it's two monsters bugged together.
Bug Report ID: #1171436194

yes, it was that same Monster for me at Vaal Factory Map, and it just happened again, same monster again at Vaal Factory.

Here is one more, exactlly the same mechanical like archery monster. It bugged my map and had to re do it...