This behavior might occur in case where the grid located in the second pane have enabled KeyboardNavigation. If this is the case, this is a standard browser behavior - when KeyboardNavigation is enabled when a row is selected the whole grid element is focused, and under Internet Explorer is trying to navigate to the top or bottom of the focused element. To avoid this behavior you need to disable the RadGrid's keyboard navigation.
If this is not the case, could you please provide more detailed information on the specific scenario:
- Which version of RadControls for ASP.NET AJAX and .NET Framework are used in the application?
- Under which browser and its version the problem occurs?
- Could you please provide a simple fully runnable project reproducing the problem so we can investigate it further?
All the best,
the Telerik team