Since the update to Oreo 8.0, my S7 Edge will no longer upload the contacts into my phonebook on both my Audis. We tried my son's Note 9 running Pie and the same problem. We also tried my other son's Apple X and that will not load the phonebook. However, I can take my old Droid Razr HD running Kit Kat out and the phonebook populates just fine.
Given the new strict hands-free laws effective 1 Jan 2020 in the states that I drive in, I can no longer make an outbound phone call without pulling off the road to access the phone directly. I have had these cars for years and this phone for two years and never had a problem until Oreo was pushed onto my phone in October.