Sonos Playing in wrong room

Hi all. Is anyone else having a problem with Sonos? I have a Tiki Bar and on the booze cabinet a ST door sensor that activates the lights and Sonos (to play Martin Denny). It has worked great for mouths, but the other day the Sonos in the hallway played instead. I re-linked Sonos and that fixed it for a day, but now it’s doing it again.

I have a feeling it’s a Sonos issue as the same thing is happing with my ‘flic’ buttons.

Anyone else had this at all?

are they grouped in the Sonos app?

No, I keep the Tiki Bar one ungrouped.