Cubase 12: Instruments randomly changed on various tracks when reopening session. VERY SERIOUS BUG

[raino]

I recently had an issue with random parameter changes being caused by a MIDI Remote device. Perhaps this is the source of your issue. Details here:

Stealth parameter changes from MIDI Remote

Recently I had a Sampler Track stop producing sound mid-playback. After poking around awhile I figured out that the Filter Cutoff had been changed from 3KHz to about 15Hz which was caused by my nanoKontrol transmitting the setting of one of its knobs which changed a Quick Control for the cutoff frequency. I understand that physical vibrations (or apparently just looking at it) can cause a controller to transmit a setting. As an experiment I left it on a set of Quick Controls for an hour or so a…