My WW 1.0 has recently started to stop at vehicle mirrors and do all the cycles back and forth. Washing only the front 1/4 of the vehicle. Then the next vehicle will be just fine. It’s very random. I’ve replaced the drivers side drive motor and gear box, love joy and wheel. Thought that fixed it but nope it’s still here. Any ideas. The count wheel looks fine and proxy seems to count fine also. Please help! Anyone… thank you for any assistance