Blueprint Diff tool fails to find nodes deleted from an Anim BP and also shows the incorrect State Machine rule

When using the Blueprint Diff tool to diff an Animation Blueprint, it fails to find nodes that have been deleted from a State Machine rule. It also fails to show the correct State Machine rule when previewing the diff.

Regression?: No
This also occurred in 4.15 and earlier versions

1. Create a new project in a Perforce depot that is based off the Third Person Character template
2. Open the ThirdPerson_IdleRun_2D under Content/Mannequin/Animations
3. Open the Default State Machine in the AnimGraph
4. Open the JumpStart to JumpLoop rule
5. Delete the Time Remaining (ratio) node
6. Save the AnimBP and check it out from Perforce
7. Open the Blueprint Diff tool (File > Diff > Depot)
8. Expand the JumpStart to JumpLoop rule and select "Removed Time Remaining"
   Result: An ensure is triggered, causing the editor to stall for a moment. Once that clears up, the graph that is shown in the Diff tool is of another State Machine rule
   Expected: The JumpStart to JumpLoop rule is shown, with the deleted node shown in the previous revision graph