I added the field "total cost" to my issue's Edit/View screen. It is there when I look at the "Configure Screen" page. I also used the 'Find your Field' feature, which says the field should be showing on my screen.
However, the field is not showing when I view the ticket. It is also not even an option as a field when I configure the issue layout for this screen.
The custom field is set for a global context.