I am using iOS 16.02 on an iPhone XR and it’s working fine with my S1 system. Maybe try switching off ‘Private Address’ (MAC Spoofing) in the WiFi connection properties for the local network and disable WiFi calling ..and see if those things resolve your issue.
Sweet, I’ll give that a go the morn
I don’t have Wi-Fi calling but I’ll try some router setting. I know turning off 5ghz helped last time I had an issue so I’ll try that too.
Just disappointed it’s stopped working for no apparent reason.
I’ll report back the morn
iOS often forgets the “local network” permission for apps when updating the OS. You need to check that.