Additional Fields not populated in the Admin -> Apointments -> Completed Appointments


I just noticed that when the appointments have been completed and the status has changed to "Completed" from "Active", the Additional Fields I created via the Additional Fields add-on are no longer populated.

If I check all my active appointments these fileds are populated ok, as soon as the time passes and they move to "Completed" status, the fields are empty.

Also, I have checked and the appointments with status "Removed" and they have also lost the values for the Additional Fields.

Any idea please? I require these fields to remain populated for running future reports.

Many thanks,