IMGUI GUI is blank/empty when project is built and running in Player

Steps to reproduce:

1. Open "Repro" project
2. Open the "Assets/Scenes/AudioPlayerScene" scene
3. Setup Flac files (Test > Setup Flacfiles)
4. Build and run the project (File > Build And Run)
5. Observe the Player

Actual results: The buttons are blank and not sized according to the text

Expected results: The buttons have text in them and are sized accordingly

Reproducible with versions: 6000.1.0b13, 6000.2.0a8

Not reproducible with versions: 2021.3.50f1, 2022.3.60f1, 6000.0.45f1, 6000.1.0b12, 6000.2.0a7

Tested on (OS): macOS Silicon Sequoia 15.3

Notes:

• Does not reproduce in Play Mode
• Does not reproduce in Development builds