Memory leak when using Blueprint Debugger while inspecting a return value

Potential memory leak when using Blueprint Debugger to inspect a return value multiple times while playing. User also reported this would cause a crash, but I didn't try to max out ram usage to trigger the crash.

I didn't observe any change in memory in 4.27.2 with the same setup. I included the logs from UE4(UE4272.log).

1. Create a new First Person Project
2. Create a new blueprint actor named 'A'
3. Create a new blueprint actor named 'B'
4. Open B
5. Add a Variable of type A (Object Types>A>Object Ref) named 'RefA'
6. Set RefA's Instance Editable and Expose on Spawn to True
7. Add a Variable of type Color (Structure>Color) named 'Colors'
8. In the Construction Script 
9. Ctrl+Drag in a reference to Colors
10. Off of the Colors reference create a 'Resize' node then set it to 30,000
11. Compile then close B
12. Open A
13. Add a Variable of type B (Object Types>B>Object Ref) named 'RefB'
14. Add a 'Spawn Actor of Class' node off of Event Begin Play
15. Set Class to B
16. Right-click and split the Spawn Transform pin
17. Create a reference to Self then connect it to RefA pin
18. Alt + drag in a reference to RefB 
19. Connect the return value of the 'Spawn Actor' node to the 'Set RefB' node then link the execution pins
20. Compile then close A
21. Open BP_FirstPersonProjectile
22. Add a Variable of type A (Object Types>A>Object Ref) named 'ProjectileA'
23. Create an 'Event Begin Play' node 
24. Off of it create a 'Spawn Actor of Class' node
25. Set Class to A
26. Right-click and split the Spawn Transform pin
27. Alt + drag in a reference to ProjectileA
28. Connect the return value of the 'Spawn Actor' node to the 'Set ProjectileA' node then link the execution pins
29. Compile then close BP_FirstPersonProjectile
30. Open BP_Rifle
31. In the Projectile Spawn Logic note find and select the 'Play Sound at Location' node that is right after a 'Spawn Actor BP_FirstPersonProjectile' node
32. Press F9
33. Press Ctrl+Shift+Escape
34. Go to the performance tab and select Memory
35. Back in the Editor press Play
36. Pick up the rifle then shoot it
37. The break point will return you to the BP_Rifle event graph
38. Repetitively(~10 to really notice the change) move the cursor over the Return Value of the 'Spawn Actor BP_FirstPersonProjectile' each time letting dialog load
39. As you are moving the cursor on and off the return value watch memory usage

Expected Results:
Memory usage is unchanged. Any change would be undone when PIE is stopped.

Actual Results:
Memory usage goes up, and remains until the editor is closed.