joinWebUrl is null when fetching via /chats/

Hi

We have a production app for Teams that has broken as a result of a seemingly random api change that we can't find any documentation for in the api change log or anywhere for that matter.

This is the endpoint that we are calling

https://graph.microsoft.com/v1.0/chats/${chatId}?$select=onlineMeetingInfo

New result:

 {
    "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#chats(onlineMeetingInfo)/$entity",
    "onlineMeetingInfo": {
      "calendarEventId": null,
      "joinWebUrl": null,
      "organizer": {
        "id": null,
        "displayName": null,
        "userIdentityType": "aadUser"
      }
    }
  }

This was working before but now it is not working without any change in our side.

Is there any info related to this change?

Thanks a lot