It just happened to me. I just updated to 2.12 last night, and I was reading some threads for another issue that I'm encountering while i rebooted and read this one and was like... that's crazy and wouldn't you know this very thing happened as I was rebooting for another issue!
This is concerning and problematic...
I am connected to the computer when I boot via USB. Windows 7, the editor was active, the vol pedal was asigned to exp2.