i did a clean install of manjaro kde 18.0.4 - updates are installed, now comes the fine tuning part.
unfortunately, a few things don't work as expected anymore.
plank & autohide (my preferred setup): still works, but clicking on icons has no effect at all (won't open programs anymore)?
with preferences on strg+right mbutton it is just about the same, now it needs to be triggered from the konsole in order to show up: plank --preferences
switching to intellyhide seems a workaround (icons are clickable), as long as no application is opened maximized, then its behaviour is exactly the same: no effect on clicking icons after unhiding the dock anymore.
any clues are very welcome.