Check the Output Source of the output you are using for monitoring. Perhaps you have plugged your monitor into the DIRECT OUT with Output Source "Git Analog" since the last update. That Output Source doesn't get muted.
I will check later when I get home from work.. I have it rigged through Scarlett 18i8 through SPDIF and through the laptop to studio monitors…sounds like that could be it though. I will post when I find out, cheers burkard