Offset rendering occurs when drawing a custom ImmediateModeElement

How to reproduce:
1. Open the attached “IN-105402” project
2. Build and run the project
3. Observe the UI element in the Player at the top left of the screen

Expected result: The UI element is entirely white
Actual result: The UI element white part is offset and the red part is showing

Reproducible with: 2022.1.0a1, 2022.3.64f1, 6000.0.52f1, 6000.1.10f1, 6000.2.0b8

Reproduced on: Windows 10 (User), Windows 11, macOS Sequoia 15.3
Not reproduced on: No other environment tested

Notes:

• Holding the left mouse button while moving the mouse in the Player will make the UI element flicker
• The flickering is less noticeable on macOS