Plugin Control on Faderport 16 not working with cubase 11.5

Has anyone run into a problem running plugins with the Faderport 16?
I’m using Cubase 11.5 on a 2020 iMac (Mojave).
I have followed all of the info and instructions but when I switch pages to gp to plugin parameters everytime I touch a fader they all move and change configuration! Scratchin’ me head !

Any help much appreciated!