Sorry not. I did open a question on this in 4.7 because there was some consistency issue with the cursor and case where we were able to loose it.
Answer Hub questions & log UE-15835
So maybe you fix this to be “working as intended” but in 4.7, the cursor was there in my UI without settings the ShowMouseCursor.
Now it’s more clear for us that the cursor is only managed by the ShowMouseCursor and there shouldn’t be any edge case where one thing is managed at 2 different places.
If you can access to the UE-15835, you might be able to see what has been done there for this Issue.