Faders Jump | CC121

I’ve noticed several times recently, with the latest Cubase update, the faders on several tracks will jump to max volume when hitting a button for the first time in a session on the cc121 - usually rewind, stop, play or record. The fader is not touched to prompt this. This is something new, as I didn’t experience it with previous versions of 10. Any ideas.

Is the CC121 set to All Midi IN ?

No. CC121 in and out set to CC121