2016 MINI COOPER Service Brakes Problems

While driving straight on an Interstate highway at approximately 65 mph, the right front and left rear brakes momentarily locked up after the windshield wipers were turned on due to light rain starting to fall. This happened multiple times, only when the wipers were turned on. There were no warning lights illuminated in the instrument cluster or dash displays. This nearly caused a loss of vehicle control on several occasions and nearly caused an accident as well. The car has been routinely serviced to factory schedules including brake fluid time based changes. There appeared to be some occasional delay in the release of the brakes when starting from a stop. The brakes were serviced after this incident and the service center recommended completing a few panic stops to operate the ABS system. They could not explain how the wiper system can cause one circuit of the braking system to operate...