I have a form with some fields and a tabpanel on it. The tabpanel holds a form based on the same table with a relation to the same record.
See example.
Now change in (par example) the shipname field the value…
Click on the tab order_details and after that the tab orders1
You will notice that the value of shipname is not updated.
Another way:After editing a field click on the tab order_details, navigate with the controller to the second card and go back to the first one. This will confirm that the value is not changed!!!
Just downloaded your example and tried this in rc3 - in my copy it works correctly! (i.e. it does save the changes when you switch tabs or records) Maybe this is fixed in rc3?