Warning on Modify Bone when targeting a Virtual Bone

Warning on Modify Bone when targeting a Virtual Bone

1. Create a Third Person template project
2. Open the mannequin skeleton
3. Right click in the skeleton tree and Create a Virtual Bone (doesn't matter where in the hierarchy)
4. Create a new AnimBP from the skeleton
5. Set up a Modify Bone node in the AnimGraph (Plug a ref pose node into it), then compile
6. Save all
7. Close and Re-open the project
8. Open the AnimBP

Result: Warning on the Modify Bone node. Says there is not VB even though it still appears in the skeleton
Expected: No warning.