CC-121 Erratic behavior with Cubase 10.5

Working as it should till 10.05
Erratic behavior now when trying to change Aux send levels ( responds to Aux mute on/off correctly at the same time )
Checked everything else - found all OK
Did the usual uninstall - install etc ( for both Cubase and CC121 - Yamaha driver )
Maybe not so important for many people but it’s the only controller we are able to purchase with direct - no hassle compatibility at a logical price.
( or it was ? )
Anyone else experiencing the same problem ?