Vortex Sound Research

So, I bought a Siel Cruise recently and it world fine for a few weeks. Then the button that activates the Poly section started acting up and didnt work anymore. Then I tried to replace the button with one of the similar ones and it worked for like 2-4 presses and then it stopped. It also did this right before I started fixing the damned thing, worked for 2-4 presses and then didnt. Anyone got a clue what is going on? Thanks in advance