Did you find a solution? Our new soft tub just started doing the same thing. It's been on the same 20 amp gfi since july when we bought it and it's the only thing on it. all of a sudden it wont stop turning off and on...
If it’s been working just fine and now it’s not, you most likely have a problem with the pump.
Is the pump physically turning on and off, or is the display just lighting up and you hear the relays clicking?