Fps and shaders

Sometime, when im getting game crash, i have to reopen the game. So when im loaded on map where im paused game starts to make shaders, few enemies invisible, projectiles invisible etc. but for a brief moment while everything become shadered and visible there is a point where i see almost everything projectails, effects and enemies, BUT i have 60-90 fps. the moment when game gets last shader loaded, im back to 30-40 fps.
I Just wanna say, that there is a few effects that cost like 100-200% performance, something like grass, ground tessellation and etc that could be disabled in options. Please
I have rx 580 8gb and ryzen 5600.

Why can't we make a static shader cache? For each card individually or for all of them at once, like in all normal games? Dynamic creation and endless creation not only harm the SD, but also the nerves.