I have a issue with my phone or car, and I can't work out wich. If my phone has been turned off and then restarted, bluetooth connection is broken. Funny thing is that the phone appears in the cars list over connected items and the cars appears in the phones list over paired items, but all that happens is the 6 digit code that turns up on the phone again and again. Only thing to do is deleted every connection in both car and phone, and then re-paired.
My phone is a Samsung S8.