I'm pretty sure this is not merely FITNR but also fixed in the current alpha team version.

OK, cool! I'd thought there was a work around in place so that pressing "pause" would correctly re-toggle the DSP mute, but not necessarily a fix to prevent it from happening in the first place. I was able to reproduce the error for a while, then it stopped happening in my car, so I was never able to test the fix. (That's why I said I wasn't sure. )