A bug was introduced in version 2.4.1 in which ripping a CD in WAV would not embed the metadata in the tracks. This would affect the UPnP Server as it would try to scan the file but no metadata was found. This will be fixed in 2.5.0.
In the meantime, as a workaround, you can edit the album on Sense, add a space to the end of the album title then remove again (to activate the Save button) then press Save. This will write all the metadata back in the WAV files.