Launch screen redraws incorrectly with an additional loading line when moved across three monitors

Steps to reproduce (original)

1. Create a new project
2. Position the launch screen so that it spans across all three monitors
3. Move the window across the three monitors
4. Observe the result

Steps to reproduce (updated)

1. Configure Windows display settings for 2 monitors as follows:
   • Primary - DPI Scale set to 125%
   • Secondary - DPI Scale set to 100%
2. Create or open any Unity project
3. Change Custom UI Settings (Edit->Preferences->UI Scale) as follows:
   • Uncheck "Use default desktop setting"
   • Change "Use custom scaling value" to 100%
4. Move the Editor's Main Window to the primary display (125% scale)
5. Close the Editor
6. Launch the Editor again and drag the Launch Screen back/forth between the 2 displays

Actual result: The launch screen becomes visually distorted, and an additional part of the loading line appears
Expected result: The launch screen remains displayed correctly

Reproducible with: 6000.6.0a1, 6000.6.0f1, 6000.7.0a6
Not reproducible with: 6000.0.0f1, 6000.0.83f1, 6000.3.23f1, 6000.5.0a7

Reproducible on: Windows 11
Not reproducible on: No other environments tested

UPDATE

This is the same issue as this bug, which was fixed but broken again.

The bug can be easily repro'd with just 2 displays with DPI scaling configure in a specific way, which I've provided as "Updated Steps". This is actually a much easier and consistent repro than the original.