The A,B,C,D switches can be used as midi controller In the POD HD 500x. It works all fine in the midi assign menu, BUT! After saving and exit from menu the HD 500 dont send midi signal. After enter to the assign menu again, the A, B, C ,D switches works. Its all works fine only when I see the midi assign menu on the LCD. Is there any option, what I dont know, or is it an error in my HD 500?