I had the same issue a couple weeks ago. When I tried to call someone, the car didn't recognize who I was trying to call b/c the car wouldn't download all my contacts. This is a recent development, b/c I've used the call feature in the car many times. Not sure exactly when it started, but probably in the last month or two. I too tried Forget this Device on both the car and the iPhone 7 with OS 14.2, and the car continued to get stuck with the spinning circle trying to Forget Device. I reached a point where I was able to Forget on both the car and the phone but then couldn't pair them back again. This went on for a week, so I made a mobile service appointment. When the tech came to my house in his Model S, he couldn't get the car to work either. We went out and paired my phone with his MS, and the phone paired perfectly. Then he tried pairing his iPhone 7 to my X, and it paired but also didn't download all the contacts from his phone either. This makes it pretty clear it's not my phone and has something to do with my X. He couldn't fix the problem. He said he would have the SC do a remote diagnostic, which they did yesterday, so I was told. So this morning after getting parked at work, I Forgot both devices again, repaired, and lo and behold, all my contacts downloaded. All is back in order. Not sure if this is temporary, but it worked as of this morning.