HybridWebView not displayed when inside the header of a CollectionView in iOS

[acaliaro]

Description

When a hybridwebview is placed inside a CollectionView header, the hybridwebview is not displayed. If placed outside the collectionview, it is displayed correctly.

Steps to Reproduce

Run the attached project, open the flyout menu and select the "Home" item

Problem also with 9.0.40

Link to public reproduction project repository

https://github.com/acaliaro/MauiCollectionViewHeaderProblemWithHWW

Version with bug

9.0.50 SR5

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS 18.2.1 iPhone 12

Did you find any workaround?

No response

Relevant log output

[kubaflo]

Hi! When I explicitly set HeightRequest in your repro it works:

  <CollectionView Grid.Row="0">
            <CollectionView.Header>
                <Grid ColumnDefinitions="*" RowDefinitions="*, Auto" BackgroundColor="Red">
                    <HybridWebView
                        x:Name="WebContent1"
                        Grid.Row="0"
                        HeightRequest="200"
                        DefaultFile="index.html"
                        RawMessageReceived="HybridWebView_RawMessageReceived" />
                    <Label Grid.Row="1" Text="This is the header but HybridWebView is not show on iOS" />
                </Grid>
            </CollectionView.Header>
            <CollectionView.EmptyView>
                <Label Text="Empty"/>
            </CollectionView.EmptyView>
        </CollectionView>

[acaliaro]

Thanks @kubaflo but do I have to set the height? I think it should take the height like on android

[kubaflo]

I'm not sure, but maybe this is related? #21604

[acaliaro]

I don’t know… but he second webview outside the collection view is correctly visualized

[Dhivya-SF4094]

This issue has been verified using Visual Studio 17.14.0(9.0.50) and Visual Studio Code 1.98.2 (9.0.50). It can be reproduced on iOS 18.2 (iPhone 12 and iPhone 16), macOS and Windows platforms.
Note: The issue reproduces on CV2 but does not reproduce on the Android platform.