I think there are knowN issues with the spectrum module in the back of the ko 3. Basically the fit is not snug enough and can allow the module to wobble on the pins. I think people put tape round or bits of card to make it more snug. Mine defo has tape round it. I'll see if I can find the article, worth a shot before buying new bits.... Just realised you are taking about ko 2.4 ignore me
