Bugs when fighting Rathma's Golem

When fighting Rathma’s Golem, I encountered bugs that caused me to die. Firstly, the screen would occasionally zoom out and it became difficult to see and control my character, with a suddenly reduced frame rate and strange movements. Secondly, when I was nearing completion, the screen suddenly went blank for seconds as the battle continued, then brought up the reliquary screen. I quickly dismissed the reliquary screen and tried to regain my bearings but it was too late, I was killed immediately thereafter.