Telerik RadGrid grouping disappears after auto-postback from another control

I have a page with a Telerik RadGrid and a Telerik drop-down list. The grid items are grouped using the <GroupByExpressions> element. When an item is selected in the drop-down, the page posts back to itself and the grid is still in grouping mode, but everything is in one unlabeled group.

Is there away to prevent this or is there way to restore the correct 开发者_C百科grouping behaviour by rebinding on the client side or something?

Nevermind! It turned out, upon the drop-down selection, the grid was assigned a new data source that didn't have any items with a value for the grouped field.

The reason I asked the question here before checking is that I automatically assumed it had something to do with the control's perceived flakiness.

I'm just leaving this here in case anyone happened to be in the same situation.