CollectionView inside invisible StackLayout doesn't show on iOS

[vpshonyak]

Description

CollectionView inside invisible StackLayout doesn't show when IsVisible changed to True

Steps to Reproduce

1. Create new MAUI
2. Add to MainPage.xaml the following:
   <StackLayout> <Button Text="Show/Hide" Clicked="Button_Clicked" /> <StackLayout x:Name="StackLayout1" IsVisible="False"> <CollectionView> <CollectionView.ItemsSource> <x:Array Type="{x:Type x:String}"> <x:String>Item 1</x:String> <x:String>Item 2</x:String> <x:String>Item 3</x:String> </x:Array> </CollectionView.ItemsSource> </CollectionView> </StackLayout> <CollectionView x:Name="CollectionView2" IsVisible="False"> <CollectionView.ItemsSource> <x:Array Type="{x:Type x:String}"> <x:String>Item 1</x:String> <x:String>Item 2</x:String> <x:String>Item 3</x:String> </x:Array> </CollectionView.ItemsSource> </CollectionView> </StackLayout>
3. Add to MainPage.xaml.cs:
   private void Button_Clicked(object sender, EventArgs e) { StackLayout1.IsVisible = !StackLayout1.IsVisible; CollectionView2.IsVisible = !CollectionView2.IsVisible; }
4. Run app on iPhone simulator or device

Link to public reproduction project repository

https://github.com/vpshonyak/BugCollectionView.git

Version with bug

9.0.40 SR4

Is this a regression from previous behavior?

Yes, this used to work in Xamarin.Forms

Last version that worked well

No response

Affected platforms

iOS

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output

[similar-issues-ai]

We've found some similar issues:

• [iOS/Mac] CollectionView is not shown when parent IsVisible is switched to true #23573 , similarity score: 83%
• [iOS/Mac] CollectionView is not shown when parent IsVisible is switched to true #16304 , similarity score: 82%

If any of the above are duplicates, please consider closing this issue out and adding additional context in the original issue.

Note: You can give me feedback by 👍 or 👎 this comment.

[drasticactions]

@vpshonyak #23573 I believe that is the same issue you are having, which @kubaflo says should be fixed with #20154, which is not in a shipping release yet.

@kubaflo Is that right?

[kubaflo]

@drasticactions @vpshonyak yea this is how you code works on the latest main:

You can try on your own with the latest nightly build

Screen.Recording.2025-03-10.at.19.29.47.mov