How to reproduce:
1. Create a new Unity project
2. Enter the Play Mode
3. Exit the Play Mode by pressing the Play button, and move the mouse button away from the controls
4. Observe the Play button
Expected results: The Play button is not highlighted
Actual results: The Play button remains highlighted unless hovered on the controls toolbar
Reproducible with: 6000.1.0b2
Not reproducible with: 2022.3.56f1, 6000.0.34f1, 6000.1.0b1
Reproducible on: macOS Sequoia 15.1 (M1)
Not reproducible on: No other environment tested
Note: If the mouse remains close to the controls, the Play button doesn't remain highlighted