Faders reverting to set volume with no automation

So I have tracks which are reverting to a volume of -1. This on tracks with no automation. I can stop them doing it temporarily sometimes by writing some automation and then switching read off. But doesnt last. Generally if I write in automation it’s still fighting it to revert to a level of -1 all the time. A Red line appears ( and is intermittently appearing now as I write this ) where track volume would be. I’ve been using automation happily and never come across this. Either a bug or I’m missing something and being dumb. Any thoughts ?

Ps just opened it up in my soon expiring Cubase 11 trial and not doing it…

Hi,

I would double-check all Remote Devices in the Studio > Studio Setup.

Did you used some VCA or Link-Groups? Maybe it could interfere there…