Splitting Steel progressively detoriates performance as clearing the areas

Splitting Steel + Nimis + a bunch of extra proj.

As I enter the map, I get ~300 FPS, as I clear the map, the FPS gets worse and worse until 60 FPS, the ground starts flickering and the projectiles get culled and become invisible.

Doesn't matter if I'm in combat or not, the game breaks more the longer I spend in one map. It fixes itself when I leave and enter the map again. Didn't happen with other builds and just started happening with this build after I got Nimis and more proj.

I thought it was my GPU dying, so I tried another one, but it didn't change anything.

The memory and VRAM don't seem to get out of control, sitting at 7GB MEM and 3GB VRAM.

CPU: Ryzen 7800X3D
GPU: RTX 4090
32 GB RAM

Cheers!

Same problem (

same issue here, since i started playing splitting steel