is it holding or does it keep getting pressed? eitherway, try to update the raven software.
If its pulsing, its a problem with the chip/install, if its being pressed and held, the button is grounded, could be the controller or installation.
When did you purchase this controller or was it a DYI install? If DIY , unsolder the A button connection and see if it resolves the problem. If you bought it premodded and you opened it, your warranty is void. you can send it to me and I will diagnose it for free and give you a quote to fix it, or you can open a ticket and send it back to viking, they will do the same.
TRY TO REFLASH THE SOFTWARE BEFORE GOING FURTHER.