Steps to recreate:

• click on the button on the top row
• press the down key on the keyboard
• Press Space key to select new button, the button on the top row is clicked

In this case, the RadGridView AutoSizeRows and ColumnGroupViewDefinition are enabled. The rows will have different heights depending on the cell content. When exporting the RadGridView to PDF, the rows will have equal size and won't respect the current size in the view. Thus longer text in a cell will be cut off. 

The same behavior is observed when exporting to PDF or XLSX. In addition, this is also observed when printing the RadGridView.

System.ArgumentException: 'An item with the same key has already been added.' when the data source contains DateTime with the same hour, minute, and seconds part (only milliseconds are different):

Incorrect or missing accessible object names in the Inspect.exe tool (MSAA).

The following line gets serialized when set this property:

((Telerik.WinControls.UI.GridSelectCheckBoxElement)(this.radGridView1.GetChildAt(0).GetChildAt(0).GetChildAt(2).GetChildAt(0).GetChildAt(0).GetChildAt(1).GetChildAt(0).GetChildAt(1).GetChildAt(0))).Visibility = Telerik.WinControls.ElementVisibility.Collapsed;

ConditionalFormatting dialog elements are overlapping in the Windows 11 theme. The text is clipped on the right: