I have a Pentair Rebel vacuum on an all Pentair setup that is only a little over a year old. Currently the vacuum will go about a foot, then turn left and do donuts. It will eventually go straight again but only for about a foot before it turns left and does more circles. I have put my hand underneath and the suction is perfectly fine, and the wheels seem to turn okay as well when I move them by hand. But when I’m water usually the right one goes forward and the left one won’t move much and then goes backwards causing the vacuum to go in circles. Any thoughts?