We have a scripted field of type Date Time Picker which is displayed in the dates section.
After a change in the custom field configuration (e.g. add a project to the context) the field appears in the details section. Additionally, in some contexts, the field becomes dysfunctional. For instance, when used in conjunction with the Calendar plugin provided by mail.ru, after changing a custom field configuration, the field is no longer considered a Date/Time field and is not available to choose from as an option to be used within the calendar. This case is detailed in SRJSUP-5465.
One workaround is to change the script field template to different type and back.