How to reproduce:
1. Open the attached project "PlayMode"
2. Open the "SampleScene" scene
3. Enter the Play Mode
4. Focus on any other window (click anything there)
5. Bring the Editor back and, without pressing anything else, in the Game view, press on the Button "Press me"
6. Observe the results

Expected results: The button becomes red on press
Actual results: The button is not clicked unless pressed anywhere else in the Editor

Reproducible with: 6000.3.0a3, 6000.3.0b3
Not reproducible with: 6000.0.59f1, 6000.2.6f1, 6000.3.0a2

Reproducible on: macOS Sequoia 15.6 (M1)
Not reproducible on: No other environment tested