For what it's worth, it didn't happen to me around any services and started a couple months before I had 953 ECU update completed. That's pretty bad they couldn't go down the ISG activation criteria. May want to refer them to service bulletin https://static.nhtsa.gov/odi/tsbs/2019/MC-10158796-9999.pdfI don't believe in coincidence--I think something happened during the SB953 software update (i.e. left it in diagnostic mode etc.).