Copied and Pasted tracks do not persist between editor session in UMG Sequencer

Copied and Pasted tracks do not persist between editor session in UMG Sequencer

Outside of //UE4/Dev-Sequencer this will result in a crash: [Link Removed]

1. Create and Open a new Blank Blueprint Template
2. Create and Open a new User Interface > Widget Blueprint
3. From the Palette, add two buttons to the designer
4. Create and select a new Animation
5. Track both buttons
6. On the first button "+Track" and add a transform track
7. Right click the transform and select copy
8. Right click the second button and select paste
9. Compile and Save the Widget Blueprint
10. Restart the project
11. Open the Widget Blueprint

Result:
Second button is missing Transform section & key data

Expected:
Second button as Transform section & key data