I have the same problem, I never had any issues with passing cars until the update now I am getting 12 alerts an hour of motion when cars that are passing are 30 feet away.
I have adjusted the motion settings and reduced the motion capture bubble down to minimum and it is still picking up cars that are out with the detection range I have set. Very annoying please fix ring as it worked before this “upgrade” now is so annoying I am considering removing the device.