No problem, I'm retired!
Check the bluetooth settings on iPhone, to see if Watch is shown as connected, both in the home and outside the home.
It may help in the analysis.
If all settings normal but behaviour is irrational there is a progressive hierarchy of remedies. Hopefully you will not need to go to the end of the list.
First force restart the Watch
i.e. press and hold both the side button and Digital Crown for at least 10 seconds, then release both buttons when you see the Apple logo.
Then, although it may seem irrelevant, while it is restarting Force Restart the paired iphone Force restart iPhone – Apple Support (UK)
Test it for a while. If it is still misbehaving... Unpair and set up again
Unpair and erase your Apple Watch – Apple Support (UK)
Series 1 to 3 are difficult to pair with iOS16 because of relatively low storage so when pairing do not try to restore the backup, pair as a New Watch
Set up your Apple Watch – Apple Support (UK)
Make sure you are not using VPN or security apps on the iPhone.
If you've completed that troubleshooting and the issue is still not resolved, Contact Support.
Click here > Contact - Official Apple Support
or phone numbers
Click here > Contact Apple for support and service - Apple Support
and or Genius Bar Reservation and Apple Support Options - Apple
