Royal Gardens (Nightmare Campaign) Bug?

[Awesome Possum]

I've encountered an issue where I'm trying to progress through the nightmare campaign and I'm stuck on Royal Gardens. The first time I attempted it, there were 6 enemies that I could not find at the end of wave 3, eventually one of them died, but the last 5 would not die. I could not hear or find them, I left the game running for 5+ minutes to see if anything would happen, nothing did. So I restarted the map, now it happens to me on every attempt, round 1 there's 1 or 2 enemies left that don't die from being stuck that I can't find. Is this a known issue or is there a way around it that anyone knows about? I've tried the map 4 times now and it happens every time.

[Thamex]

You sure that the enemies weren't on the map? I had a similar encounter with the electric aura and electric immune enemies - they did not want to walk a few steps forward and just stood there and did nothing. I was also unable to progress in this map because those mobs did not count as stuck, like. e.g. not coming out of the doorway

[DeVirus]

I've got same problem in mixmode insane magus quarters on wave 22 and 24... last mob is nowhere after like 10mins i closed the game. Seems to happen only when someone is joining me. so i keep playing solo now to test this.

[AV8R]

Triple check you don't have some immune spider for example standing below one of your towers just doing nothing. The goblins like to clump up and get stuck on each other too.

[Awesome Possum]

I ran around the map multiple times looking for spiders and couldn't find any. Still not sure what made it happen repeatedly then not happen. I've not had the problem in MP yet.