FPS Issues And High GPU Usage In Certain Areas And Scenarios

I have encountered serious fps drops when killing rare monster packs in certain maps. I think the corruption ground effect is the problem. My GPU usage skyrockets and the gpu fans are making loud noises.In addition I have serious issues when fighting Xesht, We That Are One. My fps drop to 10-30 while I fight him.Moreover, in the screenshot below you can I see my fps at 29 while the boss is dead and nothing happens.This is not the first time happening. Every Xesht fight I encounter the same problems.



Here are my pc specs:

CPU:AMD RYZEN 7 5800X3D
CPU:NVIDIA GEFORCE RTX 4070ti
RAM:32 GB

Here is the screenshot after the Xesht fight:

https://imgur.com/KvMxyKo

Forgot to add that the same issues happen at citadel boss arenas as well.

I did some further testing and I noticed that the problem was Earthshatter.
It seems that many applications of earth shatter on the ground are dropping my fps really low. Maybe the problem is that the ground effects from earthshatter never disappear. As a result the GPU is rendering all those ground/particle effects which leads to extremely low fps. If I move my character away from those ground effects my fps are back to normal.