Comment # 7 on bug 955471 from Wolfgang Bauer

(In reply to Wolfgang Bauer from comment #6)
> So this doesn't seem to be a packaging problem at least.
> I'd rather think it's an upstream bug (something not being initialized
> correctly?), but I'll try with another distribution first before reporting
> it to KDE.

As expected, I could reproduce the same behavior with Kubuntu 15.10.
I reported the problem upstream:
https://bugs.kde.org/show_bug.cgi?id=355589

Closing as UPSTREAM therefore.
Feel free to reopen or file a new bug report if you really have a problem with
the background selection.