so, you have no homes on ipad (and other iOS devices, like apple tv) and you still get these error messages?
please enable more log. maybe we will get the IP address of the device that keep querying the accessories.
to enable more logging in the console
log:set TRACE org.openhab.io.homekit
log:set TRACE io.github.hapjava
pay attention to IP address in the log file and check which device in your network has this IP.
try also with - this would force the PIN check on pairing.
allowUnauthenticated false