Bug#1142512: Updating plasma-workspace restarts plasma session, even if it wasn't running in the first place

Package: plasma-workspace
Version: 4:6.7.2-4

I'm running xfce4, but because I might want to change some day I also 
have KDE and Gnome installed. Lately, I've noticed that when 
plasma-workspace is updated, it will start a plasma session on top of 
the xfce4 session and mess up my icon theme.

This has happened in the two most recent plasma-workspace updates I've 
done. That should mean it happened in 4:6.7.2-3, but possibly not in 
4:6.7.2-2? I have not verified that, though.

I can also reproduce that by reconfiguring the package. The output from 
this is probably not helpful, since every line is about how it doesn't 
start something:

# dpkg-reconfigure plasma-workspace
plasma-baloorunner.service is a disabled or a static unit not running, 
not starting it.
plasma-core.target is a disabled or a static unit not running, not 
starting it.
plasma-gmenudbusmenuproxy.service is a disabled or a static unit not 
running, not starting it.
plasma-kcminit-phase1.service is a disabled or a static unit not 
running, not starting it.
plasma-krunner.service is a disabled or a static unit not running, not 
starting it.
plasma-ksplash.service is a disabled or a static unit not running, not 
starting it.
plasma-restoresession.service is a disabled or a static unit not 
running, not starting it.
plasma-startupsound.service is a disabled or a static unit not running, 
not starting it.
plasma-workspace-wayland.target is a disabled or a static unit not 
running, not starting it.
plasma-workspace-x11.target is a disabled or a static unit not running, 
not starting it.
plasma-workspace.target is a disabled or a static unit not running, not 
starting it.
plasma-xembedsniproxy.service is a disabled or a static unit not 
running, not starting it.

Please let me know what additional information you need.

Regards,

Torbjörn Andersson