Thank you for taking the time to report this bug and helping to make Ubuntu better.
Personally I believe the file manager should be using url-handler instead of content-hub in this case as the music already exists in the target location (on SD card/Music or in ~/Music) and does not need to be imported.
However mediascanner should have scanned the audio files on your SD card already. So if you open the music-app by itself the tracks should be there already and you shouldn't have to use file manager to play them, can you confirm if this is true?
Thank you for taking the time to report this bug and helping to make Ubuntu better.
Personally I believe the file manager should be using url-handler instead of content-hub in this case as the music already exists in the target location (on SD card/Music or in ~/Music) and does not need to be imported.
However mediascanner should have scanned the audio files on your SD card already. So if you open the music-app by itself the tracks should be there already and you shouldn't have to use file manager to play them, can you confirm if this is true?