UE5 Preview 2 problems found

1 . Static Mesh Convert to Nanite Collision disappearance.
2 . Load Level Instance
( Optional Level Streaming Class )
Crashes after running when mode is selected as LevelStreamingLevelInstance

LoginId:c1f6e9a24209a38688b09ba7c5a5726c
EpicAccountId:62af4d5cd3c54413b7f44428cea8c009

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000490

UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_Engine
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
kernel32
ntdll