Activity rings won't update/sync with iphone 16 after 26 update.

I keep having to re-pair my apple watch to my iphone to get the activity rings to sync with my watch. I've never had this problem until the 26 update. I have this problem with both my old and my newer apple watch. When I re-pair the watches the activity rings will update for a few days then I start having problems again. Ugh! Please help.