I have a custom field in a team managed project called "Region". Its linked to a response on a form in one request, and it shows the options.
Another form/request using the exact same field displays "No Options". In the form it shows the options:

In the request it doesn't:

In the other form the options display as intended:

Does anyone have any idea what can be causing this? I've never come across inconsistencies in fields displaying in some requests and not others.