Folliage actor disappears when there is too many grass meshes

[Minimal_Design1]

Hi,
I’m trying to use foliage tool to place grass into my level. Tool works fine until I reach certain number of meshes visible in viewport. When this happens, all grass disappears until I adjust the vieport to see only fraction of them. The shadows remain.

UE5
RTX3080
Intel 12th gen
32GB ram

Any idea why is this happening?
Thanks

[Minimal_Design1]

Additionaly, grass assets are visible through fence material for some reason!