Molten Facility boss attacks hit multiple times: normal?
afaik the firestorm shots bounce and also leave AOE trails on the floor, they can also overlap quite quickly. I’d consider that working as intended.
The zerker stomp is a different story. It happens when you’re near the edge of the stomps effect range, as it dissipates it remains in place for a short moment, effectively hitting you multiple times rather than simply passing over you. Im not sure if this could be considered working as intended, but your best bet is to try dodge rolling forward rather than backward and/or remain closer to the bezerker (such that if you are hit, it will only be once)