Reproduction steps:

1. Open the attached “UI two display test.zip“ project
2. Open a second Game View window (Window > General > Game)
3. Set the first Game View window’s resolution to 1000x1000 and select it to target “Display 1“
4. Set the second Game View window’s resolution to 1000x500 and select it to target “Display 2“
5. Focus on the first Game View window
6. Observe the black box
7. Focus on the second Game View window
8. Observe the black box in the first Game View window

Expected result: The UI Toolkit’s scaling stays the same and the black square is not stretched
Actual result: The black box’s position changes and the black square becomes stretched

Reproducible with: 2021.3.34f1, 2022.3.17f1, 2023.2.4f1, 2023.3.0b1

Reproducible on: Windows 10, M1 MacOS 14.2
Not reproducible on: No other environment tested