Hi @AAK1,
Could you please share a bit more about your issue?
I have made a test on my side, and don't have the issue that you mentioned.
Please check if the DataSource property of the Form in your app is set to same data source as that in your Gallery. Please make sure the Item property of the Form to following:
BrowseGallery1.Selected
In addition, please also consider take a try to disable/turn off the "Explicit column selection" option and "Improved app rendering (final validation)" option within Advanced settings of App settings of your app, then re-publish your app, check if the issue is solved.
If the issue still exists, please consider take a try to re-create a new app based on your SQL table, then check if the issue still exists.
Best regards,