Hi Marek,
If you look at the session events for those two rooms:
- https://cloud.livekit.io/projects/p_3ptpdb35j48/sessions/RM_vpSBCRaAoTKM/events
- https://cloud.livekit.io/projects/p_3ptpdb35j48/sessions/RM_bRdCiSsXQ9xu/events
And go to the final page which shows the earliest events, you’ll see that in both cases the room was created, then deleted, then participants join that room shortly after. I think this is the source of the confusion.
The most common cause of this is re-use of room names, I would recommend using unique room names where possible (I had some other advice in this answer)
Also, just to clarify on some of the naming convention, what you classify as a ‘RoomId’ is actually a ‘Room name’, multiple rooms can have the same name (but the room session ID must be unique). Personally, I tend to get lazy and will sometimes refer to a session ID as a room ID.