[Bug] Setting a MAUI Window with a new page doesn't change to the new page.

[drasticactions]

Description

A MAUI Window has a settable Page parameter. If you try to set it from within an existing page (Either by calling the top parent as I do here, or potential through dependency injection), nothing seems to happen. If you notice, the Live Visual Tree does update with the new page, and we do receive VisualTree Change events showing that something happened, but it's not reflected in the running application.

My expectation would either be that you can't replace the existing Window's page, or that if you do, it updates to the new page.

Steps to Reproduce

1. Check out this project
2. Build, deploy, and click "Replace Window with Second page"

Expected Behavior

The Window's contents change to reflect the new page.

Actual Behavior

Nothing happens.

Basic Information

• Version with issue:
• Last known good version:
• IDE:
• Platform Target Frameworks:
  • iOS:
  • Android:
  • UWP:
• Android Support Library Version:
• Nuget Packages:
• Affected Devices:

Screenshots

maui-new-window-error.mp4

Reproduction Link

Workaround

[Redth]

@mattleibow thoughts on this? especially wrt your Window PR #1468

[mattleibow]

Oh... My PR might just solve that. I'll test.

[mattleibow]

Yep, I see my PR did not do that correctly because I did it wrong. But I just fixed it :) So... "Yeah of course. We just added that feature to the new preview." 🤣

[drasticactions]

Trying this with 6.0.100-rc.1.1310 in main, it appears to be fixed. After pushing the page on the window, we get the proper events and the live visual tree propagates, and the page actually changes in the app.