TSubclassOf variable values reset on Hot Reload

After a hot reload, blueprint instances of TSubclassOf variables have their setting reset to "none"

Regression:
Yes - variable values remain after hot reload in 4.17.2 (CL 3658906)

1. Open UE4 Editor (any project)
2. Add Code based on actor (MyActor)
3. Add the following to MyActor.h:

   UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = test)
   	TSubclassOf<AActor> MySubActor;
   

4. Compile
5. Create a blueprint based on MyActor (MyActorBP)
6. Select any option in the dropdown for MySubActor
7. In VS, add the following to MyActor.h:

   UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = test)
   	float SomeNum;
   

8. Hot Reload

Result:
After hot reload, MySubActor resets to "none"

Expected:
Value set for the variable is retained after hot reload