duplicated editor playback controls when exiting safe mode

Steps to reproduce:

1. download "test-play-duplicated.zip"
2. open the project in safe mode
3. delete the script to exit safe mode

Actual results: playback controls are rendered twice

Expected results: should be normal

Reproducible with: 6000.7.0a4
Not reproducible with: 6000.7.0a3

Reproduced on: macOS Tahoe 26.5.2 (M4)