Hello,
Sorry for my english, i’m belgian.
I have exactly the same kind of things with my A4/Octatrack combo. I was really annoyed because i loose some work, just because of this, and like you i became a bit paranoiac, saving everything all the time. Today i find how this is happening with my stuff.
When i’m on the screen of the Octatrack where i can manage my thru machine, on the Playback screen, if i want to change a parameter InAB or InCD, it happen the same thing than the original poster. Osc 1 and Osc 2 of my first and second track on the A4 are lowered. My OT is the master.
I have to reload the kit to be able to work again. At first it was annoying because i didn’t know how to repair this. Now i try to be careful, but it’s still bothering me! I’m happy to see someone speaking about that, i thought i was alone.
I’m a bit lost with the midi signal out of the OT, i have to try all the possibilities to see if something can stop that annoying thing. I really need to find a solution! At least, i know how this is happening.
Edit : I loaded the “weird project” to try things. It happen only with the “INCD” parameter of the Playback page on the OT, where i have a Thru machine. If i want to change it, the Filter 2 Frequency (track 1) is lowered to 0 instantly. Weird because yesterday i think track 2 was affected, not today.