Android: Stale ContainerView retains replaced FlyoutPage graph

[AdamEssenmacher]

Description

On Android, replacing Window.Page from a FlyoutPage back to another page can leave the old FlyoutPage graph alive after forced GC.

The retained graph includes:

• the root FlyoutPage
• the flyout ContentPage
• the detail NavigationPage
• the detail content page

The isolated root cause appears to be NavigationRootManager dropping its old _rootView reference without clearing the old Android ContainerView.CurrentView. That stale CurrentView keeps the previous FlyoutPage graph rooted.

Steps to Reproduce

1. Clone the repro branch:

   git clone --branch repro/android-stale-container-view-leak https://github.com/AdamEssenmacher/maui.git
   cd maui

2. Build and install the repro app on an Android emulator/device:

   dotnet build src/Controls/samples/AndroidStaleContainerViewLeakRepro/Maui.Controls.AndroidStaleContainerViewLeakRepro.csproj -f net10.0-android -t:Install -p:AndroidDeviceSerial=emulator-5554

3. Launch the app:

   adb -s emulator-5554 shell monkey -p com.microsoft.maui.repros.androidstalecontainerviewleak 1

4. In the app, tap Open FlyoutPage.

5. Tap Return to monitor.

6. Tap Force GC several times.

7. Observe the displayed counters.

Actual result on an unfixed build:

Tracked repro pages are still alive.

Root FlyoutPage:      1
Flyout ContentPage:   1
Detail NavigationPage:1
Detail ContentPage:   1
Weak refs alive:      4/4

Expected result:

No tracked repro pages are alive.

Root FlyoutPage:      0
Flyout ContentPage:   0
Detail NavigationPage:0
Detail ContentPage:   0
Weak refs alive:      0/4

Link to public reproduction project repository

https://github.com/AdamEssenmacher/maui/tree/repro/android-stale-container-view-leak/src/Controls/samples/AndroidStaleContainerViewLeakRepro

Version with bug

10.0.60

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[nivetha-nagalingam]

This issue has been validated in Visual Studio Code 1.119.0 with .NET MAUI versions 10.0.60, 10.0.51, 10.0.0, 10.0.0-preview.1.25122.6 , 9.0.120. It can be reproducible on Android platform from version 10.0.0-preview.1.25122.6.

Screen.Recording.2026-05-11.at.12.35.48.PM.mov