Cannot add issue with another milestone to board that has a matching list label

• Go to this board: https://gitlab.com/victorwu/project-delta/boards/279508?author_id=&assignee_id=&milestone_title=M1&search=
• This board has an associated milestone
• Go to the add issues modal
• Cannot find issue https://gitlab.com/victorwu/project-delta/issues/2 to add
• This is probably because https://gitlab.com/victorwu/project-delta/issues/2 already has the Doing label
• This issue should be visible in the modal because it does not have a milestone yet