Wifi runs on 2.4ghz but I would be surprised if this caused the problems you had, maybe more down to bad luck and coincidences. Perhaps the wifi router in race control could be switched off if it's not being used and if we ever have the issues again. I think you would need to see the glitching again though before taking actions otherwise false assumptions could be made if it never comes back again.
Sanwa is normally rock solid so a bit surprised to hear of issues.
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