Comment # 6 on bug 944656 from Wolfgang Bauer

(In reply to Michael Andres from comment #4)
> (In reply to Wolfgang Bauer from comment #3)
> > - "zypper up" didn't want to update kio-extras5 for some reason (e.g.
> > package was not in the repo yet, a conflict, locked package, ...)
> 
> ...or installed from a different vendor (maybe OBS project rather than
> tumbleweed)...

Another possible reason: kio-extras5-lang doesn't exist any more. The installed
kio-extras5-lang-5.3.2 requires kio-extras5 = 5.3.2 and prevents kio-extras5
from being updated.
As mentioned on the Factory mailinglist:
http://lists.opensuse.org/opensuse-factory/2015-09/msg00205.html

The translations are in kde-l10n now starting with version 15.08.0, but that
package doesn't obsolete kio-extras5-lang (and the 15.08.0 version isn't in
Tumbleweed yet anyway).

I submitted a fix for this too:
https://build.opensuse.org/request/show/330109