1. Disappearing Mobs
Sometimes, while fighting monsters in Jad, they will disappear. I'm not sure the reasoning, but it normally happens when it's almost dead. (Yes, I'm experiencing this after Thomy updated it)

2. Mobs Being Stuck on Items
Most of the time, during early waves, the ranged monsters will get stuck about 5 spaces away from the safe spot, and if you have auto-retaliate on, you will move to them, and to the left. Pulling the aggro of the monster stuck behind the wall.



3. Maged and Melee Mobs Spawning Together
I'm not sure if this is a glitch, or whether intended; on wave 61 a mage and a melee monster spawn, which is alright, but the way they spawn make it impossible to kill one without the other attacking you. They spawn like so: