Apple Watch doesn't connect to WiFi automatically

Hi all,

i have a problem with my AppleWatch 4 (WatchOS 8.7) and WiFi. My watch does not connect to my WiFi when my iPhone is not nearby. When I am walking around in my home, I don't want to carry around my iPhone all the time, but still get noticed from my AppleWatch. This is not working. My watch is showing a sign on the top of the screen that my iPhone is not reachable. When I check the WiFi setting on my watch, I can see, that it is not connected to my WiFi. When I manual select my WiFi, the watch will connect to it instantly.

I've already turned WiFi off and on on my watch, or ignored the WiFi and set it up again. I also disconnected the watch from my iPhone at set it up again. This didn't helped. I can't remember that this worked in the past, so I think this is not related to any WatchOS version.

What I also noticed is, that it worked, when I turned off private WiFi addresses. But unfortunately this option is turned on automatically after a while. My iPhone WiFi connection works perfect although private WiFi addresses is turned on.

Do you have any idea to troubleshoot this problem or even fix it?

Thanks,

Tobias