Why is Unreal 5.2 crashing when working with rivers?

I’ve been working on my project, scalability set to low, unlit mode. The map is 4065x4065, however there is nothing else on the map, just the river, not even the sky or directional light. Whenever I try to do anything with the river I had created earlier, or add a new one, the editor simply freezes. I know there’s another similar post, however, my VRAM is far from maxed. Also, I am guessing this is part of another problem, which is less specific, Unreal simply freezes when my VRAM is near max, no warning nothing. Also, I don’t know how the VRAM simply builds up overtime without me adding anything. I will list my specs below.

Ryzen 9 3900x
Radeon 6700XT
32GB 3200Mhz Single Stick DDR4