After reviewing the upstream bug report, I have to say that it doesn't seem to be the same. This bug has no relation to a "navigation panel" / "tree view" in Konqueror, and I do not use such an option.
-- When a menu is opened, KDE & Konqueror shortcuts stop working https://launchpad.net/bugs/45846 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs