Steps to reproduce:

Alternative steps to reproduce :

Create and open a new project
Download the attached `UnsavedChangesDebugWindow.cs` file and add it to the Assets folder of project
Open `Window > Debug > Unsaved Changes Repro`
Click the button labeled `Mark Dirty`, not the asterisk in the window's title
Change the Layout of the Editor
Click 'Cancel' in the prompt
Observe the Editor

Actual results: Another duplicate prompt is shown (3 more times) followed by a 'Missing Default Layout'

Expected results: Layout change is canceled, no more prompts are shown

Reproducible with versions: 6000.0.82f1, 6000.2.0a7, 6000.3.23f1, 6000.5.10f1, 6000.6.0b10, 6000.7.0a5

Not reproducible with versions: 6000.2.0a6

Tested on (OS): Windows 11 Pro (25H2)

Notes:

After 4 prompts, another prompt is thrown: "Missing Default Layout", asking to restart the Editor
- Data may be lost as a result if 'Quit' is pressed