Crash When deleting an animation state while it is open in other tab

When deleting a state in a state machine while the state is open in another tab the editor will crash

1. Open the third person template
2. Open "ThirdPerson_AnimBP"
3. Open "Default" State machine
4. Open "JumpStart"
5. Go back to the Default state machine (without closing the Jumpstart tab)
6. Delete "JumpStart"

Result: The engine crashes
Expected: The Editor would through an errror/not crash/fail more gracefully