Comment # 1 on bug 1206739 from Mark Gray

This change to the file /etc/profile.d/openssh-dbus.sh seems to fix the bug:

if test -n "$SSH_CONNECTION" -a -n "$DISPLAY"
 then
     export SAVE_DISPLAY=$DISPLAY
     unset DISPLAY
     dbus-update-activation-environment --systemd --all
     DISPLAY=$SAVE_DISPLAY
     unset SAVE_DISPLAY
fi

At least krunner and kdewallet work now so I'm a happy camper again.

You should consider dropping the --all from dbus-update-activation-environment
command and only sending the environment variables systemd really needs in my
opinion, but I have no idea what problem you are trying to address here.

Have a happy New Year.