Running openSUSE Tumbleweed, latest updates, KDE Plasma desktop.

I use Dolphin in split-window [two-column] mode (old Norton Commander
habit...), and I use Krusader the same way. Dolphin has an issue with which of
the two windows [columns] gets the focus when Dolphin starts, while Krusader
does everything alright. This holds for both the standard and root versions of
invoking Dolphin.

I want Dolphin to always have the focus on the l.h.s. window [column] when
Dolphin starts. Thus, in Dolphin "Preferences", I have "Start" -> "Show at
start" -> "Folders, sub-windows, window status as of last start" (translated
from German).

However, annoyingly, Dolphin always comes up with the focus on the r.h.s.
window [column]. It doesn't help to exit Doplhin with the focus on the l.h.s.,
and there is no setting I can chose in Preferences to help either.

I am first filing this bug here on the openSUSE Bugzilla, and I might also file
it on the KDE Bugtracker. Having asked on the openSUSE Forum has not produced a
result yet.