Same
I tried my parking assist on the 3rd day I had the car and the same thing happened. I called the sales rep immediately and he asked me to come see the service manager. The service manager seemed very concerned and took the car in, after a few days the SM called to say they couldn't figure it out but it was consistently "climbing the curb" and they had elevated it to BMW USA in NJ and then on to BMW in Munich. They ordered a new parking module and told me I could come get the car.
A few weeks later, I called to check on the part and they told me to bring it in. The SM told me all of BMW was watching my car and that they were videotaping the tests after replacing the module for the Germans to watch. I few days later, he called me back to tell me that the car continued to the same thing and that they pulled a new car off the showroom floor that did this as well. The next day, he called me to tell me that the official word from BMW is that this option is called "parking assist" and that it is not meant to be fully autonomous, that they were repairing the wheel and would call me in a few days. Honestly after driving a loaner for 12 days of the first 6 weeks of ownership I didn't care any more. I just wanted my car back. I haven't tried to use this option again and probably never will.