Thanks smacdonald2008​. I've raised this issue with customer support and am awaiting their response.  Incidentally, it appears if we create the parsys items (eg text) under the itemX node. The parsys items will also get wiped out everytime we update ANY fields in the dialog.  The multifield doesn't ...

The problem is that you are not creating your parsys node as a child of your multifield nodes.You can use pure htl to solve this without using use classes.<sly data-sly-test="${resource.hasChildren}" data-sly-list="${resource.listChildren}">  <sly data-sly-test="${item.hasChildren && item.name=='tab...