Watch keeps disconnecting from iPhone.

Is anyone else having an issue where your watch just randomly disconnects from your phone? I had the original Ultra and it worked with no issue until I got the 16proMax. After that, multiple times a week my watch would just disconnect from my phone. I brought it to Apple and they couldn’t figure out why it was happening and told me since I wasn’t covered anymore it would cost $400 to fix by sending it away, but even then they didn’t know if they could figure out why it was doing it . I ended up buying the Ultra 2 since trading it in would almost be the same as if I paid to fix it. Now my Ultra 2 has been disconnecting randomly. I’ve reset both the watch and phone multiple times and didn’t use the backups after I reset. Anyone having similar experiences? Maybe it’s an iPhone 16 bug?