Ever since iOS 14/WatchOS 7 my watch will not vibrate/buzz when I get a call unless I restart my phone. Once I restart my phone it will work for a bit. I think it works until my watch is out of range of my phone for the first time and then it doesn’t reconnect, but it’s ONLY for calls. Watch Control Center shows that it’s connected to my phone and everything except calls works as expected. This is a problem as I have a LTE watch that I regularly use without my phone.
I’m reasonably certain it’s not the phone or the watch as both have been recently upgraded, but this problem was happening in iOS 14/WatchOS 7 before I got the new devices.