I have a Bulls SIX50+ E FS 3 which has a Bosch Performance line CX. I've ridden the bike about 50 times for about 400 miles total (I ride about 4 times a week) since I bought it in June 2017. In the past three weeks the motor and display unit (Intuvia) has powered off on it's own while riding 4 different times. I press the power button and it powers back up after about a minute. No error code is displayed. Is there some trick to see if there is a hidden internal error code somewhere? Any help is appreciated, it's an hour drive one way to the dealer I bought it from.