I have a select list custom field with multiple contexts - one is default context, and the X-context which is only defined for one issue type for Project X.
When editing an issue in Project X, the field has the following options: None, A, B.
When doing a search filter, I can search where custom field in ("A", "B"). But it returns nothing when I try where custom field is EMPTY, even though there are issues that do not have anything set.
Is this a bug with multiple contexts?