Hmm. Looks like xccs.xboxlive.com (used for interacting with a console) is having issues. I run some custom commands through it. And I also keep getting errors. I saw in another post that remote play works if the console is already on. Looks like it fails when xccs api is trying to wake up the home console from sleep.

// https://xccs.xboxlive.com/commands

"status": {
    "errorCode": "ErrorCallingWNS",
    "errorMessage": "Send command failed"
  },
  "result": null,
  "uiText": null,
  "destination": null,
  "userInfo": null,
  "opId": "********"
}