I’ll start by saying I DON’T use apple HomeKit with my Sonos and they aren’t even registered with the home app.
I have a play 5 that always reverts to kitchen. I’ve removed it, factory reset, reinstalled and named living room. 24 hours later and it says kitchen again.
I have a move that does the same thing except it always goes to dining room.
sonos has no clue how to fix it.