[BUG] - Kikiyaon boss' health looks like it's below 0, cannot be defeated

Issue Description: Encountered a bugged state at during the Kikiyaon boss fight. I got the health bar of the boss below 0 somehow, and then there was no way to damage it so I couldn't defeat it. More hearts kept getting spawned as normal but they wouldn't take damage after dismantling their shells. Not sure if this would be related but earlier in the fight i used the fire tornado super ability on it (that wasn't how I got it below 0 though, I used that around the middle of the fight). I'm also playing on the easy combat difficulty, and I had died to the boss by getting swallowed by the shadow a couple times before getting it to this point. Screenshot is attached.

Platform: PC, Epic

Operating System Version: Windows 10