Editor crashes on startup if uninitialized UPROPERTY object pointer is used in USTRUCT

Development Platform & Builds Mobile
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I do confirm I have had twice that error (different projects). It is still unclear exactly why, but it is indeed related to pointers inside a FStruct. In my case not a AActor* but a UStaticMesh*:

	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Item Properties")
		UStaticMesh* MeshInSpace;

This pointer is not setup at structure creation, but is later setup after an ActorItem is created, containing this FStruct.

So I am guessing either:

  • there is a problem with the structure creation with UE4 engine (memory allocation ?) or
  • the engine somehow is trying to access a value to that pointer (some kind of reflexive analysis ?)

[EDIT]
Strangely, just explicitly setting the variable inside the FStruct to nullptr was sufficient to remove the error & crash…