A slightly different tracker issue

Having installed the HA Android App on my Samsung Note 9, the tracker is showing me resolutely 400 metres away from my actual Home location, therefore I am permanently away. But, very oddly 2 or 3 times a day, it switches me to Home for a few minutes, sometimes this happens at 2 or 3 in the morning with no other activity going on.

I have uninstalled the app, deleted all trackers and reinstalled the app a few times.
The phone is set to maximum location accuracy
Google maps on the phone records my position completely accuracy.