1.) In online play with a friend both of us from time to time would have problems with casting bladestorm but it does no damage. We would spin and hear the sounds that bladestorm make but no damage numbers would appear and the monsters health bars would not decrease. Ending bladestorm and casting it again would fix it. This happens maybe every 5-10 casts of bladestorm. This has never happened to me in offline play.

2.) In online play both my friend and I have problems with Juggernaut. It will sometimes play the sound and make the animation for the cast but the blue shields and the status bar for Juggernaut will not appear. Hitting the button again will not make it explode and Juggernaut goes on cooldown. This has never happened to me in offline play.

3.) Just ran a map with extra chests in offline mode where my Thunderstrike did no damage and would not make the enemies health bars appear above their heads. The map was bugged in that one of the required monsters that I had to kill was on the minimap but I could not see or attack it. I did notice that when creating the dungeon the red progess bar for buying modifiers was missing.

4.) My friend and I sometimes have problems trading. We get the message that the other person is too far away even though they are standing right next to us. Have to exit back to the main menu and start another game in order to trade.