Lots of minor issues but software updates scare me

Something strange began happening to me after my 4/2026 annual service.

For a sports car stereo I was always good with the Keff, but then after my annual service the sound became suddenly worse. I had checked the master volume when this thread first posted back in late March and was not surprised at all to see that the Master was already maxed out. I took my car in on 4/26 and ever since the Master volume keeps resetting down to 50% no matter what I do.

The prime suspect here is the campaign installed which updated the CEM. Here are the details of that campaign 131-25011: https://static.oemdtc.com/NHTSA-PDFs/MC-11021413-0001.pdf

Referenced Keff thread = https://www.emiraforum.com/threads/keff-sound-system-improvement.7791/

I'm all ears if anyone discovers a permanent solution......
 

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