First is when the anima buff in thorgast becomes full.Noticed the camera becomes a bit hitchy while this bar is full (if you don’t use it) which resolves the moment you use the bar.
A good way to see this happen is run a frametime graph up and fill the bar up (don’t use it) and see the minor frametime spikes on the graph or simply move the camera around with the bar full and you will notice minor camera hitching.
The second fps issue I noticed is near keepers respite when there’s the world boss infront of it (whirlwind world boss) the fps drops drastically while this is going on.