So I noticed my game was starting to run slow after some time, and noticed a memory leak capping all my RAM(16GB). Proceeded to search for the origin for hours and found that this mod when paired with the Humanoid Alien Races mod, causes the problem.

The issue continues after disabling every single mod, only leaving this active.
-Game + all DLCs
-Harmony
-Humanoid Alien Races
-[NL] Facial Animation

Disabling either Humanoid Alien Races OR [NL] Facial Animation stops the problem

Fun thing to notice is that the memory leak only gets worse when pawns are on screen and stops getting worse when they are not.

Hope this helps anyone somehow