Low FPS, bad performance

Issue Description (Required):

I’m having an issue every single time I attempt to play the game where my frame rate will degrade over time, without ever returning to baseline. When I launch the game, I will have ~80 fps in the hub. Once a mission is launched, my frame rate will be around 60-80. As the mission progresses, my frame rate will slowly decline more and more. The lowest I’ve seen over a span of two missions was a frame rate of 22. When I return to the hub, my frame rate does not increase, but instead stays within 5-10 fps of the lowest it was in-mission. Restarting the game remedies this issue, but it will immediately start again as soon as I launch into the next mission.
Darktide is the only game giving me this issue.

[PC] Do You Use Mods? (Optional):
Yes, and I’ve tried playing both disabling them and with them - issue is the same.

Reproduction Rate (Required):
Constant (100%)

Attempted Solutions (Optional):

I have tried changing different settings. I have reinstalled old drivers, than new again. Nothing helps. Restarting the game helps to restore the FPS to norm - 60-80, but then same thing happens again - FPS drop to 20 after a mission or two.

Platform (Required):

PC - Steam

[PC] PC Specifications (Optional):

My hardware is as follows:
Processor 11th Gen Intel(R) Core™ i7-11800H @ 2.30GHz 2.30 GHz
Installed RAM 32,0 GB (31,7 GB usable)
Storage 932 GB SSD NVMe KINGSTON SNVS1000G
Graphics Card NVIDIA GeForce RTX 3050 Laptop GPU (4 GB), Intel(R) UHD Graphics (128 MB)
System Type WIN10 - 64-bit operating system, x64-based processor
Screen 2560x1440, but I paly on 1920x1080