Yes either exposure to the elements because the cellophane window of the keypad gave way over time and allowed water into the board. Also here in FL, critters like to sneak up and hide up in that area by the board. I've found snakes in many systems and that caused the board to short and do funny things. Ultimately the board needed to be replaced.
One other thing, is the unit worth it to keep putting so much money into? How does it look inside under the burners and around the manifold by the gas valve?
To be honest.... I am sure I am putting a bandaid on the issue. The PCB board/buttons will be my last attempt. Currently I have $ the funds to try that. I don't have the funds to replace the whole unit. So if this does not work it might be a year before I can replace the whole unit.