Wrong rendering of Grid cell content

[Dokug]

Description

When filling a 24x14 grid with a frame and a label for each cell, the label gets omitted on a semi-random basis as seen in the first picture.
When omitting the frames, all labels are shown, as seen in the second picture.
I have only tested this on Windows, not yet on any other platform.

I don't think this is expected behavior, but if it is, I apologize.

Best regards,
Dokug

Steps to Reproduce

1. Create a File > New .NET MAUI App
2. Replace the MainPage.xaml ContentPage Content with:

<Grid x:Name="ScreenGrid"
              RowDefinitions="*,*,*,*,*,*,*,*,*,*,*,*,*,*"
              ColumnDefinitions="*,*,*,*,*,*,*,*,*,*,*,*,*,*,*,*,*,*,*,*,*,*,*,*"/>

3. In the MainPage.xaml.cs constructor add the following:

for (int row = 0; row < ScreenGrid.RowDefinitions.Count; row++)
{
    for (int col = 0; col < ScreenGrid.ColumnDefinitions.Count; col++)
    {
        Label label = new Label
        {
            Text = "A"
        };

        ScreenGrid.Add(new Frame(), col, row);
        ScreenGrid.Add(label, col, row);
    }
}

4. Run the app to see the missing labels
5. Comment out the line adding the frames to the ScreenGrid to see the difference

Version with bug

Release Candidate 3 (current)

Last version that worked well

Unknown/Other

Affected platforms

Windows, I was not able test on other platforms

Affected platform versions

Windows SDK 10.0.17134.0

Did you find any workaround?

No response

Relevant log output

No response

[v-longmin]

Verified repro on Windows10 with VS 17.3.0 Preview 1.0 [32427.505.main]. Repro with above project.

[hartez]

If you're looking for a workaround until we get this fixed, you can add label.ZIndex = 10; to force the Labels to have a higher z-index than the Frames; that will prevent the Labels from being hidden.