CollectionView Header and Footer leak memory on iOS

[EGoverde]

Description

Content placed in a CollectionView.Header or CollectionView.Footer does not get garbage collected on iOS. This is not happening on Android or WinUI. Tested using nightly '8.0.60-ci.net8.24304.1'.

The non-nightly version MAUI 8 has more memory-related issues with CollectionView that have been partially resolved in the nightly (see #20710), but this one still remains.

I created a demo project using MemoryToolkit.Maui.

Steps to Reproduce

1. Create a Page with a CollectionView in XAML.
2. Define a CollectionView.Header or CollectionView.Footer with any XAML (like a Label).
3. Navigate to and then away from the Page.
4. The content inside the Header or Footer does not get finalized.

<CollectionView ItemSource=".."> <CollectionView.Header> <Label Text="Leaking Component"/> </CollectionView.Header/> </CollectionView>

Link to public reproduction project repository

https://github.com/EGoverde/MemoryLeaks

Version with bug

Nightly / CI build (Please specify exact version)

Is this a regression from previous behavior?

Yes, this used to work in Xamarin.Forms

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

No response

Did you find any workaround?

No response

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!

Closed similar issues:

• CollectionView is not currently being Garbage Collected (2) (#21249), similarity score: 0.86
• Android CollectionView leaks if given a header or footer (#16961), similarity score: 0.85
• [net7.0 / net8.0] [iOS] Memory leak when the CollectionView uses CollectionChanged and when adding a CollectionView to a Page makes it and the entire page live forever (#14654), similarity score: 0.81
• [net7.0 / net8.0] [iOS] Memory leak when CollectionView.ItemsSource changes (#14664), similarity score: 0.80
• CollectionView is not currently being Garbage Collected (#20710), similarity score: 0.79

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

[RoiChen001]

Can repro this issue at iOS platform on the latest 17.11.0 Preview 2.0(8.0.60-ci.net8.24304.1&8.0.60-ci.net8.24303.1).

[dotnet-policy-service]

Hi @EGoverde. We have added the "s/try-latest-version" label to this issue, which indicates that we'd like you to try and reproduce this issue on the latest available public version. This can happen because we think that this issue was fixed in a version that has just been released, or the information provided by you indicates that you might be working with an older version.

You can install the latest version by installing the latest Visual Studio (Preview) with the .NET MAUI workload installed. If the issue still persists, please let us know with any additional details and ideally a reproduction project provided through a GitHub repository.

This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.