Can't pin/keep/lock Quod Libet 4.2 to docks using bamf

[Alexander Browne]

Since upgrading the music player Quod Libet to the latest version (4.2, via ppa:lazka/ppa), I there's no option to pin it to the MATE dock applet. I'm using 18.10, and I also tried Plank. A Quod Libet developer confirmed the issue as well in Unity on 16.04. AFAICT, these three docks all use bamf.

Since all earlier versions of Quod Libet work fine, I posted a bug with them (https://github.com/quodlibet/quodlibet/issues/3029), but there are no reports of any issue with it from other docks/shells, like GNOME Shell or Plasma, so maybe it's a bug with bamf?

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: bamfdaemon 0.5.3+18.04.20180207.2-0ubuntu1
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
CurrentDesktop: MATE
Date: Fri Nov 16 17:50:42 2018
InstallationDate: Installed on 2016-11-22 (724 days ago)
InstallationMedia: Ubuntu-MATE 16.10 "Yakkety Yak" - Release amd64 (20161012.1)
SourcePackage: bamf
UpgradeStatus: Upgraded to cosmic on 2018-09-29 (48 days ago)

[Khurshid Alam (khurshid-alam)]

Doesn't look like a bamf bug though.If previous versions were working then something broke in the application level. Make sure the app is setting the app id and name properly.

Check syslog for errors.

[Alexander Browne (elcste)]

OK, thanks for taking a look, I appreciate it.

I did look at the syslog but I don't see anything related to banf or the docks, just some gtk theme warnings...

I did notice, however, that Quod Libet 4.1 is listed in the MATE dock and Plank as "Quod Libet", while 4.2 is listed as "<track title> - Quod Libet".