2017 KW T800 Error codes with ECU ABS wheel sensors

Has anyone else had a problem with ECU error messages? I get this message: "The engine ECU has detected an issue with the wheel speed at the rear axle right wheel speed sensor". It disables the ABS. It's even de-rated me a couple times. I've had it in the KW shop for this more times than I'd care to mention. They've replaced the wiring harnesses and changed out sensors, etc. yet it still keeps throwing codes. So far, it's only happened during the winter months - rain, snow, ice. I haul logs and the thought of getting de-rated while loaded on a snowy, woods road would be a dangerous situation. KW can't seem to figure it out.