[Android] Modal page wrapped in NavigationPage is not garbage collected after PopModalAsync

[Vetle444]

Description

When a ContentPage is pushed as a modal wrapped in a NavigationPage via Navigation.PushModalAsync(new NavigationPage(page)), neither the NavigationPage, the inner ContentPage, nor any of their child views are garbage collected after calling PopModalAsync.

A plain modal page (without NavigationPage wrapping) is collected correctly.

This works correctly on iOS.

Steps to Reproduce

1. Clone https://github.com/Vetle444/MauiTestApp/tree/modalMemoryLeak
2. Tap ModalPageNotCleanedUp
3. Tap Push Modal Page in NavigationPage
4. Close it
5. Tap Force GC & Check Cleanup
6. Notice that everything is still alive

Link to public reproduction project repository

https://github.com/Vetle444/MauiTestApp/tree/modalMemoryLeak

Version with bug

10.0.50

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

9.0.100 SR10

Affected platforms

Android

Affected platform versions

No response

Did you find any workaround?

Check PR in DIPS.Mobile.UI for workaround: DIPSAS/DIPS.Mobile.UI#818, specifically StackNavigationManagerWorkaround class

Relevant log output

[NafeelaNazhir]

This issue has been validated in Visual Studio Code 1.111.0 with .NET MAUI versions 9.0.0, 9.0.120, 10.0.0-preview.1.25122.6, 10.0.0 & 10.0.50. It can be reproducible on Android platform from Net 10 versions.

Screen.Recording.2026-03-13.at.11.03.25.AM.mov

[karthikraja-arumugam]

The issue will be resolved by the PR #34117