Under the Util/Shows button – Utility tab – Diagnostics – Automatic mode
When it happens again, capture a video of the diagnostics on the sliders. I have had to replace all banks of sliders 1x and waiting on the arrival now for complete replacement #2.
This has broken my show more than once when I switch banks and it turns a vocal mic down or if I’m in monitor mix mode it has changed the level of that channel in someone’s IEM. I have the S7000 and had plenty of extra channels to work around it until the replacement arrives.