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.