UMG textfield crash with using Metal

UMG textfield crash with using Metal after switching screens and spamming a UMG text field. User provided an example video for reference.

Link: [Link Removed]

1. Download the attached project
2. Open the attached project
3. Launch onto an iPhone 5s
4. Click the top text field and spam letters with all four fingers
5. Click the bottom text field and spam letters with all four fingers
6. Click the button in the bottom right
7. Double click the home button on the phone
8. Select the project
9. Click the top text field and spam letters with all four fingers
10. Click the bottom text field and spam letters with all four fingers
11. Click the top text field and spam letters with all four fingers
12. Notice that the app will crash

Expected: The text field would continue to be filled with letters
Result: The application closes