Comment # 3 on bug 1097590 from Wolfgang Bauer

(In reply to Bernhard Dr. Friedrichs from comment #2)
> I briefly installed 15.0 in a VM to see if I can copy the docs - that`s all.

I'm not sure I fully understand you.
I just installed the libqt5-qtdoc* (5.9.4) packages shipped with Leap 15.0, and
they are indeed complete (in particular, QFile and QMap definitely do show up
in assistant-qt5).

Maybe you added the KDE:Qt5 repo to your 15.0 installation?

AFAIK this problem only occured with 5.11.0 as mentioned.

Changing the product to Tumbleweed therefore.
I think we can just close it though, as a fix has been submitted and accepted
already.

But thank you for your report!