The DataGrid will crash when there is a bunch of CollectionChanged events with Grouping enabled. This happens in 6.6.0, 6.7.x and 6.8.x versions of the Telerik DataGrid. 

It seems that the default fonts in the RadDataGrid do not support some languages, for example this text "이름" cannot be displayed in Android and WinUI. Rectangles are rendered instead of the correct symbols.

Note that a maui Label can properly display the text.

We’ve encountered an issue related to the inner DataGrid within an outer DataGrid’s RowDetailsTemplate:

Steps to reproduce:

1. Create a DataGrid with editable cells and row details.
2. Inside the RowDetailsTemplate, place a layout (e.g., Grid).
3. Within this layout, embed another DataGrid with editable cells.
4. Start the application and expand row details on the Android platform.
5. Double-tap on any inner DataGrid's cell to open the cell editor. 

At this moment the UI appears unresponsive.

Header Text, group header text, do not display some languages characters like Chinese, Thai, etc.

The root reason for this is the fact that the Skia APIs used to draw the text does not support automatic character fallback.

Workaround:

for header text:

<telerik:DataGridTextColumn.HeaderContentTemplate>
    <DataTemplate>
        <Label Text="your text"></Label>
    </DataTemplate>
</telerik:DataGridTextColumn.HeaderContentTemplate>

group header text

<telerik:RadDataGrid.GroupHeaderTemplate>
        <DataTemplate>
            <Label Text="{Binding Group.Key}"/>
        </DataTemplate>
</telerik:RadDataGrid.GroupHeaderTemplate>

column:

<telerik:DataGridTextColumn HeaderText="Name" >
    <telerik:DataGridTextColumn.CellContentTemplate>
        <DataTemplate>
            <Label Text="{Binding Name}"/>
        </DataTemplate>
    </telerik:DataGridTextColumn.CellContentTemplate>
</telerik:DataGridTextColumn>

When navigating to DataGrid examples, xaml binding errors occur for ActualWidth and Header Text. 

Still, the app runs as expected.