Hi,
I have encountered a possible bug whereby an editform correctly displays the item data in preview mode but not in the published version. I have used both UpdateContext and Set to assign the ID of the SharePoint item of interest and used this to lookup the record for the default property.
I have tried recreating the EditForm from scratch using the same properties - same issue
I tried using first(SharePointList) - this worked on both preview and published.
I made a similar post about an hour ago detailing a similar issue with vertical containers. Any help would be appreciated