Apple watch series 7 keeps resetting itself
I bought a series 7 watch less than 2 weeks ago. It's worked fine until 2 days ago. I put it on the charger at night, and when I remove it in the morning, it's reset itself and I have to set it up as new watch and restore from backup. Yesterday it was easy enough, but this morning it didn't want to pair and took over an hour to get it back. I recently installed the latest security update on phone (12 pro max) and I wonder if this has anything to do with it? The OS on the watch is up to date as well. Any suggestions? I really don't want to have to play groundhog day and set up a "new" watch every day.
Apple Watch Series 7, watchOS 8