How to reproduce:
1. Open the Editor on the secondary monitor
2. Right-click in the Project window and select Reimport
3. Observe the progress bar location

Expected result: Progress bar appears on the same monitor as the Editor
Actual result: Progress bar appears on the main monitor

Reproducible with: 6000.0.13f1, 6000.0.46f1, 6000.1.0b14, 6000.2.0a8
Not reproducible with: 2021.3.50f1, 2022.3.61f1, 6000.0.12f1

Reproducible on: macOS 15.3.2 (M1 Max)
Not reproducible on: Windows 11

Workaround: If you drag the progress bar to the secondary monitor, triggering it again will make it appear on the secondary monitor. This behaviour is reset if you close and reopen the Editor.

Note: Issue is also reproducible by modifying a Script causing a domain reload