Rhythmbox does not save metadata for FLAC files

[Sean Fitzpatrick]

Since upgrading to Ubuntu 17.10, Rhythmbox does not record the metadata entered in the "Extract" interface when converting CDs to FLAC files. (I have not checked to see if the same is true with mp3.)

Expected behaviour: I load a CD, and Rhythmbox loads the metadata for the album from MusicBrainz (or I enter it manually if the album is not found). If I click Extract, the CD is converted to my preferred file format (in this case, FLAC), and the metadata is added to the resulting files.

This was the case on Ubuntu 17.04 and earlier.

Current behaviour: metadata is loaded from MusicBrainz as usual, but when I extract, most of it is not added to the files.

If the metadata provided is Track Number, Artist, Album, Title, Genre, Disc number, and Year, I see the following:

The title that results is the file name, for example:
James Ehnes - 02 - Ravel: Berceuse sur le nom de Gabriel Fauré.flac

The Artist, Album, Track Number, and Genre tags are not written.

Curiously, the Disc number and year tags *are* written.

More curiously, as a file is being converted, all the tags display in Rhythmbox as expected. But the moment the extraction reaches the end of the file, and the file is saved, the tags disappear.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: rhythmbox 3.4.1-2ubuntu5
ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Feb 22 18:41:48 2018
InstallationDate: Installed on 2015-08-14 (923 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
LogAlsaMixer:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined
   Playback channels: Mono
   Mono: Playback [on]
SourcePackage: rhythmbox
UpgradeStatus: Upgraded to artful on 2017-12-22 (62 days ago)