Massive memory leak in CollectionView while scrolling

Description

Scrolling through items in CollectionView leads to massive memory leak if the DataTemplate has Grid/VerticalStackLayout/HorizontalStackLayout as its first children. Wrapping the layout inside a Border solves the issue.

DataTemplate causing the issue:

            <CollectionView.ItemTemplate>
                <DataTemplate>
                    <HorizontalStackLayout>
                        <Label Text="{Binding .}" />
                    </HorizontalStackLayout>
                </DataTemplate>
            </CollectionView.ItemTemplate>

DataTemplate solving the issue:

            <CollectionView.ItemTemplate>
                <DataTemplate>
                    <Border>
                        <HorizontalStackLayout>
                            <Label Text="{Binding .}" />
                        </HorizontalStackLayout>
                    </Border>
                </DataTemplate>
            </CollectionView.ItemTemplate>

• Speed of scrolling doesn’t seem to affect the issue.
• GC is getting triggered, but the memory keeps going up infinitely in spite.
• The memory leak is really significant and makes the app unusable very quickly.
• Attached repository is 7.0.0-rc.1.6683, but I had the same problem in 6.0.x.
• Android was tested only on Windows Subsystem for Android and the problem seems to be the same.

Steps to Reproduce

1. Load the repository and run the example.
2. Scroll up and down in the CollectionView.
3. Watch the memory usage in ResMon/memory profiler.

Link to public reproduction project repository

https://github.com/Vroomer/MAUI-CollectionView-memory-leak.git

Version with bug

Unknown/Other (please specify)

Last version that worked well

Unknown/Other

Affected platforms

Android, Windows, I was not able test on other platforms

Affected platform versions

Windows SDK 10.0.22000, Windows subsystem for Android 2207.40000.8.0

Did you find any workaround?

Wrapping DataTemplate’s layout children inside Border solves the issue.

Relevant log output

No response

[jonathanpeppers]

I’ve been testing memory leak issues with this app.

These should fix this:

• https://github.com/dotnet/maui/pull/13260
• https://github.com/dotnet/maui/pull/13333
• https://github.com/dotnet/maui/pull/13327

(I marked the last one to close this when merged)

[HausBJB]

Hello, is there any news? These are things that should be in as soon as possible. Every app has lists and how can you expect to publish an app with such a performance.

Thanks