Hi Hrvoje Voda,
The issue that you have reported in your first update was “On selecting a row from third page, grid navigates to page 1”. So, we ensured with a sample and provided the same mentioning the issue wasn’t reproduced at our end.
Also, the sample that we have provided doesn’t have the grid within the UpdatePanel. So, on performing server events, the page refreshes.
Since we have enabled server events for selection, full post occurs on selecting a record and thus grid refreshes each record in grid. So, if you place the grid within the UpdatePanel only partial post will be performed and thus the grid doesn’t get refreshes on selecting each record.
Ragavee U S.