i don't know if this has always been a thing, but on this map i had tried to use the difficulty name "Für immer" and it would submit OK, but wouldn't allow me to re-download the map from the website ...
When import has failed (because of a seller wasn't specified: #1218), the downloaded file doesn't get removed: r.m.web.feature.image.ImageServiceImpl : Image info has been saved to database ...