Available in the 2017 R1 release (2017.1.117).

DataFormatString is not respected when exporting RadGridView to .xlsx file and a GridViewDataColumn is bound to a nested property.

Available in LIB version: 2017.2.605

1.   Run the sample application.

2.   Scroll to the last item.

3.   Begin to resize the window. The direction is irrelevant. Only the horizontal scrollbar needs to be visible.

4.   Observe that in the beginning of the resizing, the scrollbar auto scrolls upwards a little and the last item is half hidden.

I have a custom column based on GridViewBoundColumnBase. In it I override GetCellContent. If I bind the column to a nested property (MyProperty.SubProperty), what I return in GetCellContent is not shown, instead the nested property's "raw" value is shown.

Attached is a project illustrating the issue.

Available in the R1 2017 SP1 Release.

A workaround for the issue is to use RadObservableCollection as a source collection. Before the items are added to it, call the its SuspendNotifications method. Respectively, after that call the ResumeNotifications one. 

Another approach would be to populate the items through the AddRange method of the collection.

Available in R3 2017 Release

An exception with the following StackTrace is thrown:

       at System.Windows.Threading.Dispatcher.VerifyAccess()
       at System.Windows.DependencyObject.GetValue(DependencyProperty dp)
       at Telerik.Windows.Data.FilterDescriptor`1.get_FilteringExpression()
       at Telerik.Windows.Data.FilterDescriptor`1.CreateFilterExpression(ParameterExpression parameterExpression)
       at Telerik.Windows.Data.FilterDescriptorBase.CreateFilterExpression(Expression instance)
       at Telerik.Windows.Data.Expressions.FilterDescriptorCollectionExpressionBuilder.CreateBodyExpression()
       at Telerik.Windows.Data.Expressions.FilterExpressionBuilder.CreateFilterExpression()
       at Telerik.Windows.Data.QueryableExtensions.Where(IQueryable source, CompositeFilterDescriptorCollection filterDescriptors)
       at Telerik.Windows.Data.QueryableCollectionView.CreateView()

Available in LIB version 2017.1.206 , it will be also available in the R1 2017 SP1 Release.