Basically, it was just a bug and it worked for me, but its not a real solution if already worked wrong. If it crashed several times and it didn’t work properly (layers were missing, materials looked weird), i had to delete Unreal cache - if i remembered correctly, i think it was somewhere in
Users\YourProfileName\AppData\Local\UnrealEngine\Common
or something like that. I don’t remember exactly. But it was definitely in windows Users folder. Then all shaders will be recompiled and it worked normally again.