If these JF/O's are in the AOA I suggest they get some advice from them. At the very least advise the the AOA what is taking place.
If the company is putting you back to line flying as a S/O during a break in your training then..........................this IS NOT TRAINING, YOU ARE ALREADY QUALIFIED AS A S/O AND ARE NOT UNDER THE SUPERVISION OF A TRAINING OFFICER.
THEREFORE:--- This can only be a REQUEST to work on a G Day, and if you work you should be paid accordingly.