"Of course". Sigh. As if everyone in the world knows that. I'm neither a KDE nor an Okular user, but perhaps someone could suggest that they update their web sites to have links to their bug tracker.
I checked bugs.kde.org and couldn't find any bug report for this issue. Perhaps I missed it somehow. If not, hopefully someone will create one. Seems like that should have been the first step when the Debian maintainers marked the issue as wontfix.