I have a custom field, with a value, that's not configured on any screens. When viewing the issue (eg. https://blah.atlassian.net/browse/PROJ-1810) I want to see the custom field and it's value. When I "Create" or "Edit" an issue, I don't want to see the custom field, which is why it's not configured in my Default Issue Screen nor my Bug Issue Screen.
To be clear, the custom field does have a value. If I add it to any of my screens, it does appear when viewing an issue. I don't want it on my screens because I don't want users to edit the value.