Color picker preview shows colorful pixels when cursor is dragged on the sides of the screen

Reproduction steps:

1. Open the user's attached project
2. Select "New Material" Material from the Project window
3. Enable "Emission" and press the Color picker on the Emission Map field
4. Drag the cursor on the border of the screen

Expected result: Outside of the screen is black color
Actual result: Outside of the screen is colorful pixels

Reproduced with: 2019.4.40f1, 2020.3.36f1, 2021.3.5f1, 2022.1.8f1, 2022.2.0a18, 2023.1.0a1

Reproducible on: macOS 12.4 (Intel), macOS 12.4 (M1)
Not reproducible on: Windows 11, Windows 10