Warrior Unable to Hit Zalmarath, The Colossus

As a Warrior I am unable to defeat this boss not because of skill issue but because of It not letting me be able to hit him. I have thorns build going and I am tanky so I usually am just going toe to toe with the boss wailing on them. But for this Boss Zalmarath when he stabs the ground and pulls his sword towards him, it also pulls me a little closer to him as well. Somehow that glitches out the game and I am unable to attack him. The only damage that I could do is thorns damage, and its pretty hard to defeat a tanky boss only use thorns and no other skill to help out with it. The link I provided is me showing that I am unable to hit this boss with attacks or skills, if damage was done in the process of this small clip it was because of thorns damage.
https://www.youtube.com/watch?v=mkK-CdBNMd8

I'm experiencing the same issue as a warrior sometimes it happens and gets undone and then I can hit him again but the issue appears again before I can kill him

Yep ran into this today on a totem warrior. It seemed like during the phases he would migrate to the right side of the arena, sometimes he would just become invulnerable. I couldn't figure out what conditions would do it though. I was using shockwave totem, earthquake, resonating shield, and mace strike.

Same problem here. Playing rolling slam warrior and have to force quit the game because he becomes invincible and I can't do any damage at all.

It only didn't happen once when I got him down to 75% health but died to his ads anyways. Other than that, I can't get him back to that point due to him being invincible

This just happened to me as well. Tried exiting out of the client and loading back in without success. Had to die and reset the boss to get his hitbox back. Really frustrating, this has been my only death on the Warrior so far.

Yep, just experienced this bug now on my warrior using totem, boneshatter, leap slam, and earthquake. Not a single ability would damage him.
Glitched off the stage area down to the boss's leg area, still couldn't hit him.
I just sat there while looking this up and the boss took almost 2 minutes to kill me slowly so I could reset the fight.
I had zero issues on my grenade Merc for this boss.

OK killed him on my 2nd attempt on warrior.
The 2nd time I was able to hit him no problem.
Basically I just stood near his left arm and wacked away.
The 3 dagger stabs and his arm swipe didn't affect me at all.
Once that was working, it was just a matter of going through the mechanics. EZ peasy. Still a super buggy stage, though. My totem, if placed near the edge, would visually glitch and stretch down through to the bottom of the screen. It looked really stupid. Please fix this GGG. Love y'all.