How to reproduce:
1. Open the “IN-99326_Unity6-URP” project
2. Ensure secondary monitor is set as “Extended display” in OS Display settings
3. Select File > Build And Run (Cmd + B)
4. Observe both monitors

Expected result: Main monitor displays the UI and second monitor displays 3D Scene
Actual result: Main monitor displays UI upside-down and second monitor displays the UI while flickering

Reproducible with: 2023.2.0a19, 6000.0.47f1, 6000.1.0b15, 6000.2.0a9
Not reproducible with: 2022.3.61f1, 2023.2.0a18

Reproducible on: macOS 15.4 (M1 Max)
Not reproducible on: Windows 11

Notes:
- The issue did not reproduce when both of the monitors were accessory (two monitors connected to the laptop, laptop screen shut) likely indicating that a mac built-in display is needed for reproduction
- In 6000.2.0a9 the text is not upside-down on the main monitor (secondary monitor still displaying upside-down UI and flickering)
- In 2023.2.0a19, the UI is not upside down in both of the monitors, but secondary monitor has the flickering UI instead of the 3D Scene