Zalmarath invulnerability after basic attack/worst bug report system I've seen in my life

Zalmarath the Collosus becomes invulnerable after hitting him with a few basic attacks (only happened on mace strike, didn't try other weapons). Restarted the fight like 6 times to make sure, basic attacks strongly seem to be the cause of Chunky McBigBoy becoming invulnerable
P.S. Holy molly this bug report system is trash, still not even sure if this is where it should be posted. Almost information given in-game, poe2 site directs to poe site, no mention if that should be like that or not, no clear instruction of how it should be done. Gotta bloody do internet navigation aeorobics to get to the point of actually writing the bug out. How the hell yall gonna fix the bugs if 95% of people reporting them will give up trying to find this shit halfway and the other 5% will forget what the bug even was before reaching the point where they write it out

Bug Report ID: #3708056906

This is also happening with actual skills. I've been able to make the boss go invulnerable with Ice Crystals and Bone Cage when the boss moves to a different side of the arena while firing the projectiles. In my case, seems like the boss bugs out when it walks into an object, the object being the crystal or cage