Crashing due to some mesh issue.

I tried what you suggested, and the affected mesh still did not load after going back to DirectX11. After I Delete the Saved and Intermediate files, it starts with a crash report.

Assertion failed: Header.Len != 0 [File:D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\UObject\UnrealNames.cpp] [Line: 2196]

UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_AssetRegistry
UnrealEditor_AssetRegistry
UnrealEditor_AssetRegistry
UnrealEditor_AssetRegistry
UnrealEditor_AssetRegistry
UnrealEditor_AssetRegistry
UnrealEditor_AssetRegistry
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
UnrealEditor_Core
kernel32
ntdll