No problem here, everything is off on a parking spot start and even after selecting cold & dark on the efb.
If you have state saving on, then the knobs will reflect your last flight. So if you didn't turn them off then, they won't be off next flight.
I will note however, my com1 and 2 volumes (kx radios, I didn't check the garmins) are not retaining the state saving for me.
@Martyn I am under the PerformacePlus beta if that matters.