Bug report

Group Header appears multiple times on PDF Export if the group is separated onto multiple pages

Reproduction of the problem
Run the following Dojo:

https://dojo.telerik.com/itOpeGON/6

Click on export to PDF

Open the PDF

Scroll down until you reach Venezuela to see there are two headers for the same group

Expected/desired behavior
Only one group header shall be present at the export

Environment
Kendo UI version: all
Browser: all