<DataGrid> <DataGrid.Columns> <DataGridCheckBoxColumn> <DataGridCheckBoxColumn.HeaderTemplate> <DataTemplate> <CheckBox /> </DataTemplate> </DataGridCheckBoxColumn.HeaderTemplate> </DataGridCheckBoxColumn> ... </DataGrid>I found similar issue like
viewtopic.php?f=15&t=5875&p=24643&hilit ... ate#p24643
Here WPF standard controls are used (dotnetcore 3.1), not DevExpress neither Telerik.
The behavior is unchanged even adding x:Name or AutomationProperties.AutomationId.
I found documentation how to identify controls in data template:
docs.microsoft.com/en-us/dotnet/desktop/wpf/data/how-to-find-datatemplate-generated-elements
Can you help to identify this control?