We just updated our working project from 5.3.2 to 5.4.1 and are now receiving a list of over three thousand objects that are breaking the garbage collector rules so we are stuck without a solution too.
" Error message: Fatal error: [File:C:\FS\Git\UnrealEngine\Engine\Source\Runtime\CoreUObject\Private\UObject\GarbageCollectionVerification.cpp] [Line: 439] Encountered 3064 object(s) breaking Object and Internal flag assumptions."