Components defaults not updating on hot reload

Certain values, when changed in code, are not updated in a hot reload. For example, changing the Target Arm Length of a spring arm component will updated after hot reload, but changing the Scale does not update.

1. Open UE4 Editor (any project)
2. Add code based on Character (MyCharacter)
3. Add the following to MyCharacter.h

   	UPROPERTY(VisibleAnywhere, BlueprintReadWrite, meta = (AllowPrivateAccess = true), Category = test)
   		USpringArmComponent* MyArm;
   

4. Add the following to MyCharacter.cpp

   	MyArm = CreateDefaultSubobject<USpringArmComponent>(TEXT("MyArm"));
   	MyArm->SetRelativeScale3D(FVector(0.9, 0.9, 0.9));
   	MyArm->TargetArmLength = 900;
   

5. Compile
6. Create a blueprint based on MyCharacter (MyCharacterBP)
   • Note Spring arm component defaults
7. In code, change FVector to (0.5, 0.5, 0.5) and TargetArmLength to 500
8. Hot Reload

Result:
TargetArmLength is set to 500 after hot reload but Scale is still set to (0.9, 0.9, 0.9)

Expected:
Settings behavior is consistent after hot reload.