VRAM spikes to 7.8GB in desert, is the priority out of bounds?

I used GamePP Resource Scheduler immediately after noticing the 7.8GB VRAM ceiling via GamePP. Lowering background streaming to 'Normal' and raising the game to 'High' was my only real fix. Earlier, I lowered textures to Medium, but RTSS still showed 20-35ms spikes. After the priority swap, VRAM settled at 6.2GB and frame time held at 12-15ms. The desert finally breathes again.