UE 5.5.1 Mutable Plugin: Packaged Build crashes if clothes are used.

All my packaged builds are crashing if the CO is configurated with ‘enable clothing’. Logfile:

[2024.12.16-08.56.40:134][882]LogWindows: Error: === Critical error: ===
[2024.12.16-08.56.40:134][882]LogWindows: Error: 
[2024.12.16-08.56.40:134][882]LogWindows: Error: Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 783] 
[2024.12.16-08.56.40:134][882]LogWindows: Error: Array index out of bounds: 432 into an array of size 371
[2024.12.16-08.56.40:134][882]LogWindows: Error: 
[2024.12.16-08.56.40:134][882]LogWindows: Error: 
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff60c38cdae MyGame-Win64-DebugGame.exe!UCustomizableInstancePrivate::BuildOrCopyClothingData() []
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff60c3bffa0 MyGame-Win64-DebugGame.exe!UCustomizableInstancePrivate::UpdateSkeletalMesh_PostBeginUpdate0() []
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff60c40ad41 MyGame-Win64-DebugGame.exe!impl::Task_Game_ConvertResources() []
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff60c3dc8c7 MyGame-Win64-DebugGame.exe!UCustomizableObjectSystem::AdvanceCurrentOperation() []
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff60c4154b8 MyGame-Win64-DebugGame.exe!UCustomizableObjectSystem::TickInternal() []
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff60a884321 MyGame-Win64-DebugGame.exe!FStreamingManagerCollection::UpdateResourceStreaming() []
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff60a87dde9 MyGame-Win64-DebugGame.exe!FStreamingManagerCollection::Tick() []
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff60aa97769 MyGame-Win64-DebugGame.exe!UGameEngine::Tick() []
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff60bcb3b05 MyGame-Win64-DebugGame.exe!FEngineLoop::Tick() []
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff60bcc43ec MyGame-Win64-DebugGame.exe!GuardedMain() []
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff60bcc44ba MyGame-Win64-DebugGame.exe!GuardedMainWrapper() []
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff60bcc71b2 MyGame-Win64-DebugGame.exe!LaunchWindowsStartup() []
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff60bcd40d4 MyGame-Win64-DebugGame.exe!WinMain() []
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ff610d4b43a MyGame-Win64-DebugGame.exe!__scrt_common_main_seh() [D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
[2024.12.16-08.56.40:134][882]LogWindows: Error: [Callstack] 0x00007ffb1a79e8d7 KERNEL32.DLL!UnknownFunction []
[2024.12.16-08.56.40:134][882]LogWindows: Error: 
[2024.12.16-08.56.40:144][882]LogExit: Executing StaticShutdownAfterError
[2024.12.16-08.56.40:145][882]LogWindows: FPlatformMisc::RequestExit(1, LaunchWindowsStartup.ExceptionHandler)
[2024.12.16-08.56.40:145][882]LogWindows: FPlatformMisc::RequestExitWithStatus(1, 3, LaunchWindowsStartup.ExceptionHandler)
[2024.12.16-08.56.40:145][882]LogCore: Engine exit requested (reason: Win RequestExit)

Same here, we have the crash only in cooked (loose files or packaged) builds. In the editor it works fine.