diff --git a/ui/jquery.ui.draggable.js b/ui/jquery.ui.draggable.js
index debdadd22..d27255cac 100644
--- a/ui/jquery.ui.draggable.js
+++ b/ui/jquery.ui.draggable.js
@@ -477,7 +477,7 @@ $.ui.plugin.add("draggable", "connectToSortable", {
 					instance: sortable,
 					shouldRevert: sortable.options.revert
 				});
-				sortable._refreshItems();	//Do a one-time refresh at start to refresh the containerCache
+				sortable.refreshPositions();	// Call the sortable's refreshPositions at drag start to refresh the containerCache since the sortable container cache is used in drag and needs to be up to date (this will ensure it's initialised as well as being kept in step with any changes that might have happened on the page).
 				sortable._trigger("activate", event, uiSortable);
 			}
 		});