One missed call for every incoming call.
Anytime I receive an incoming call and I look back into my recent call log, it shows a missed call first. I have confirmed with people that they only called once and i answered, but there is literally a missed call for every incoming call I have received. This only happens with phone calls, not FaceTime calls. I also never receive a notification about a missed call from these. I just see it in the recents phone log. You can see in the picture that it happened 4 times. My phone has the most recent update: iOS 14.0.1
iPhone 11 Pro Max