DrillDown bug EXTREMELY UGRENT!!

The story: I've reported a bug with the filter bar in version 4.4.0.51, and you said that it's been fixed in the latest version.
Yesterday I installed version 5.2.0.25. and yes the filter works nicely.
BUT the grid falls apart after a couple of refreshes. I'm sending you an example code so you can see for yourself.
Guide:
1. Click the refresh button.
2. Place your cursor inside one of the nested table cells.
3. repeat form step 1.

It usually collapses by the third time i click the refresh button.
This is EXTREMELY CRITICAL bug, and my boss will have my head on a platter if this doesn't start working ASAP.
So please tell me what the problem is.

DrillDown.zip

Try inserting a line of code to reset the relations before changing the datasource.


set.Relations.Add(childFriend);
gridGroupingControl1.TableDescriptor.ResetRelations(); //<< gridGroupingControl1.DataSource = ParentTable;


I worked... thanks a million