Multiple controls with the same ID '_LightweightGroupPlaceHolder' were found

Hi Pavlina,

 Thanks for the reply.  This RadGrid does already have different UniqueNames for each column.  It does have a detail table, however, where some of the columns from the DetailTable also share UniqueNames with the main RadGrid.

 I changed these as well just to be safe, so every UniqueName from the RadGrid and DetailTable columns are unique, but I am still experiencing this error once every 10,000 pageviews or so.

 This only started happening once I upgraded to Telerik ASP.NET AJAX 2016 Q1.

 Just today I tried upgrading to the new 'Latest Internal Build' 'Telerik_UI_for_ASP.NET_AJAX_2016_1_127_Dev_hotfix'.  However, I am still experiencing this issue.

 Has anyone else come across this issue?  Or do you perhaps have any other ideas as to why this would happen?