Username who uploads new files does not get registered
Please see movie sent to Mattermost: https://mattermost.coko.foundation/coko/pl/gjzfm5qmifns7e3oeninp7egso
This only happens for source files which are not submitted yet. So if User A uploads a file, and the status is 'New Upload'. And after that User B uploads the same file, the username is not updated, keeps the username of the first user who uploaded that file.