I just got a Pixel 6 and had my notifications working for camera alerts on my devices but then went away for a weekend and was not getting alerts. I hadn't thought much of it but I came back and separately connected to a supplemental WIFI I have at home for other reasons and after being back on the main WIFI my Home app is all reset. It looks like I have to setup my doorbell and cameras and all of my devices into a home again starting fresh. This is also happening on my old phone that was left at home and had not been logged out of any accounts so I know the account is still correct. I cannot find anything about a backup or restore for this but it seems odd all of the data can disappear or be redirected so easily as to completely clear everything without the account being switched or home deleted.