You recently made a change to the time entry fields when scheduling a recording which means that you can't use the tab key on the keyboard to switch between hours, minutes, and the AM/PM field. Please revert this change. You also seem to have broken something that seems to tend to remove the space between MM and AM/PM which makes the time field invalid, so you have to go and click back in the field and remove the space.
This is incredibly awkward and you should revert this change.