Assignments refactor regression: resubmission modification check doesn't work

create an assignment of type "Single File Upload", allowing unlimited resubmissions hit the grading page for any student who has not yet submitted as that student, go to submit to the assignment confirm the message 'You may resubmit if you modify this submission' message does not appear at the bottom of the page add an attachment and submit return to the assignment to resubmit confirm the message 'You may resubmit if you modify this submission' now appears at the bottom of the page, and the submit button is disabled confirm that after removing and attaching a new file, you can now resubmit repeat the above for the "Attachments Only" type, confirming that making any change to the attachments list allows resubmission