Hi - I have been having the same problem. I read on the Person integration about the clashes that can happen so I removed all persons and # out the person from config. I then stripped all the known devices apart from the house mobile phones. I then reloaded persons from the services and rebooted.
I have two nmap scanners running both are set with the scheduled scan interval 0:00:20. On reboot it showed in the error log as having 2 sets one with the default 12 and the other 20 which repeated. After 40 mins it settled down to showing both 20.
I have also noticed the known_devices has changed in the descriptions of the devices. Everything appears to be running showing "‘home’ that I want to except the error log of ‘Updating device list from legacy took longer than the scheduled scan interval’
Just thought I’d share the observations if it helps anyone.