In dolphin when I click on a file to open it the file isn't selected

on my laptop with freshly installed leap 16.0 running KDE 6.4.2
in dolphin when I click on a file to open the file isn’t selected
in leap 15.6 plasma 5.27.11 when a file was clicked it was also selected, how to have this behaviour also in leap 16.0 with KDE 6.4.2??

I have this in systemsettings

in 15.6 plasma 5.27.11 when I click on a file to open it, for example usb multiuser mount.txt, the file is open and the result in dolphin window is this (selected file)

in 16.0 KDE 6.4.2 the same operation lead to this (no selected file)