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

Outside of //UE4/Dev-Sequencer this will result in a crash: UE-69535

Steps to Reproduce
  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

Second button is missing Transform section & key data

Second button as Transform section & key data

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Affects Versions4.224.23
Target Fix4.22
Fix Commit4920185
Main Commit6863971
Release Commit4920462
CreatedFeb 6, 2019
ResolvedFeb 6, 2019
UpdatedJun 6, 2019