Person object changing state very often

I use person object state changing to / from home to trigger some presence based automations.
These work great for many people but one in particular triggers very frequently. While it’s not a massive problem (just inefficient!) it is bugging me :frowning:

Looking at the person entity in the activity tab, I do not see any changes, yet there will be very many automation activiations due to this state changing.

The person is configured with two device_tracker sources, one is life360 based and the other is a unifi device tracker (for the mobile phone appearing on the home wifi). None of these trigger / change either.

How might I go about diagnosing this?