UPlayerMappableKeySettings* FEnhancedActionKeyMapping::GetPlayerMappableKeySettings() returns null in DebugGame build but not in Editor oder Shipping build

Hey everybody,
weired behaviour from the EnhancedInput Plugin.

Following this tutorial: Player Mappable Keys using Enhanced Input | Tutorial

and testing it in our packaged builds we came aroud a strange behaviour.
Also everything is setupped as in the tutorial listed the method
UPlayerMappableKeySettings* FEnhancedActionKeyMapping::GetPlayerMappableKeySettings() const returns a nullptr but only in DebugGame packaged builds.
Packed builds with shipping works fine and in the Editor it also works fine.

Maybe the Unreal Team wants to investigate it a little bit further