diff --git a/js/widgets/widget-grouping.js b/js/widgets/widget-grouping.js
index d87b6276..78337ac9 100644
--- a/js/widgets/widget-grouping.js
+++ b/js/widgets/widget-grouping.js
@@ -234,7 +234,8 @@
 				if ( $.isFunction( wo.group_formatter ) ) {
 					data.currentGroup = wo.group_formatter( ( data.group || '' ).toString(), data.column, c.table, c, wo, data ) || data.group;
 				}
-				data.$row.before( tsg.groupHeaderHTML( c, wo, data ) );
+				//add first() for groping with childRows
+				data.$row.first().before( tsg.groupHeaderHTML( c, wo, data ) );
 				if ( wo.group_saveGroups && !data.savedGroup && wo.group_collapsed && wo.group_collapsible ) {
 					// all groups start collapsed; data.groupIndex is 1 more than the expected index.
 					wo.group_collapsedGroups[ wo.group_collapsedGroup ].push( data.currentGroup + data.groupIndex );