I have the same issue when running on a Win64 dedicated server (UE 5.4.1).
The crash is occuring when the dedicated server tries to load a new map
CollectGarbage() … VerifyObjectFlags() → crash
Error: Fatal error: [File:[...]\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollectionVerification.cpp] [Line: 439]
LogWindows: Error: Encountered 17 object(s) breaking Object and Internal flag assumptions. Please check log for details.
It was working fine in 5.3.2.