radiculve

Hello , I have a problem with my x3 live . For some time after turning on no sound , if I press the pedal wah wah seems to work (though not modulates the wah wah ) but only with the pedal mode wah wah . after a variable period of time , from one hour to five hours POD start functioning correctly . if I turn it off and restart immediately the problem does not occur anymore, but if I keep it off for a while, for example, half an hour I have to wait again to make sure that everything returns to normal. I tried to reset it to factory defaults and reprogram the firmware but it does not change . To any of you ever do this ? It ' a known problem ?