I've found that when I turn on the elevator master switch, it takes control of pitch...but when I turn off the elevator master (leaving the aileron master on) it doesn't let go of it.  I move the yoke and nothing happens.

But here is the crazy part...if I then flip the altitude hold on and then off again, I can control pitch with the yoke normally.  I have to do the altitude hold "on/off" routine every time I turn the elevator master off (with aileron master on) in order to control pitch with the yoke.