Just to update you on the solution, I had exactly the same issue as a previous user mentioned sometime ago. All of a sudden, my Drag Drop repeating group used to reorder sections stopped working. As soon as I selected a draggable group, it disappeared. Spent ages trying to figure out what it was and it turned out to be another plugin here iOS and Android UI Components Plugin | Bubble for iOS and android components. There must be something conflicting with the draggable elements. As soon as I uninstalled, all worked fine. Just in case anyone runs into similar issues, hope this helps.