Thanks for your help.
Yes, the phone is connected to another wifi network when this is occurring - not only that, but where it is occurring, the wifi has the same SSID as the home location.
IOW, the name of the network where the HASS server is called “ThisNetwork”, and the issue is occurring when the phone is at another location where the network is also called “ThisNetwork” (long story why its setup that way). I’ve not seen this happen when connected to other wifi networks (yet).
But, no networks are assigned to a zone in Ariela - so I would not think that the network would set a zone.
This did not occur to me as a problem till you asked, but obv. this is the source of the issue right?
Which logs are you looking for (sorry, a bit new to this - not seeing anythign relevant in home-assistant.log and assuming you dont need to see whats in Logbook).