Memory leaks when replacing Application.Current.MainPage by a new one keep the old page in memory

[Djakar]

Description

I created a new MAUI app from scratch, removed the Shell and created 2 ContentPages named Page1 and Page2.
In Page1, I just placed a button that calls Application.Current.MainPage = new Page2();
In Page2, I started a thread with a serie of GC.Collect();
After memory analysis, I saw that Page1 is kept in memory.

Steps to Reproduce

1. Create a new MAUI application

2. Remove the Shell and the page created by the wizard

3. Create a new content page and name it Page2.

4. In code behind, in the ctor, start a new thread like this:
   new Thread(async () => { await Task.Delay(5000); GC.Collect(); GC.Collect(); GC.Collect(); }).Start();

5. Create a new content page an name it Page1

6. In Page1, add a button with this statement in the click event handler: Application.Current.MainPage = new Page2();

7. In App.xaml.cs, replace the shell by MainPage = new Page1();

The issue is similar with 8.0.60 SR6

MauiApp1.zip

Link to public reproduction project repository

No response

Version with bug

8.0.40 SR5

Is this a regression from previous behavior?

Yes, this used to work in Xamarin.Forms

Last version that worked well

Unknown/Other

Affected platforms

Windows, I was not able test on other platforms

Affected platform versions

No response

Did you find any workaround?

Not yet

Relevant log output

No response

[github-actions]

Hi I'm an AI powered bot that finds similar issues based off the issue title.

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it. Thank you!

Open similar issues:

• Memory leak when using shell navigation on Android (#21853), similarity score: 0.81
• Page-level memory leak in NavigationPage on iOS (#20119), similarity score: 0.80

Closed similar issues:

• .NET MAUI Shell app page navigation memory leaks (#15930), similarity score: 0.85
• Memory Leak on Page Navigation while removing the page. (#21403), similarity score: 0.84
• Memory leak while repeatedly navigating between pages (#10578), similarity score: 0.83

Note: You can give me feedback by thumbs upping or thumbs downing this comment.

[RoiChen001]

Can repro this issue at Windows platform on the latest 17.11.0 Preview 2.0(8.0.40&8.0.60).