POE2: Common and extreme FPS drop, only fixed by restarting client

CPU: 11th Gen Intel(R) Core(TM) i5-11400H @ 2.70GHz
GPU: 3050Ti
RAM: 16GB DDR4
Storage: SSD
Renderer: DirectX12
Multithreading: Enabled

~2 days ago I started encountering severe fps drops (started when I reached maps, but has since occurred everywhere), taking my average 45fps down to 5fps, seemingly out of nowhere. The only fix is restarting the client.

I am sadly unable to reproduce the bug with consistency, but I am forced to restart whenever it does occur, making things like Ultimatum impossible and Trial of the Sekhemas/mapping much harder and annoying to complete. Does not seem to be tied to any specific player/enemy skill, but occurs every few maps/zones within trial of the sekhemas.