Packaged game crash with Bad Export Index

Development Platform & Builds
,
7

In my case i defined a UTouchInterface varialbe in my subclass of APawn, it runs well on Win64, but it got crashed on Android:

UPROPERTY(EditDefaultsOnly)
    TObjectPtr<class UTouchInterface> PawnSpecifiedTouchInterface;

still don’t know why…

Edit:
Then I tried TSoftObjectPtr, my game run well again,

    UPROPERTY(EditDefaultsOnly)
      TSoftObjectPtr<class UTouchInterface> PawnSpecifiedTouchInterface;

so , it means sometimes hard object reference leads to crash with Bad Export Index…