Why is my watch getting disconnected from the phone sporadically

I have a Samsung Note 20 Phone and a Samsung Watch 46mm. I have it set up so that the watch vibrates if it loses connection with the phone. This happens about 4 times a day, even when I have both in my possession. I havent been bothered by it. Unfortunately, this also happens when I am sleeping. It ignores the **Do Not Disturb** and wakes me at all sorts of hours. Normally I ignore it and try to go back to sleep. I finally looked at it at 4amish. Its losing connection. I dont have any automation type software installed, so nothing should be fiddling with bluetooth. **Why would the watch lose bluetooth connection with the phone ?**