The Realtime Updates service is experiencing a backend issue that caused updates to stop flowing completely at around 20:00 PST. Our engineers are investigating and will post an update here as soon as we know more.
The backlog has been processed now and the service resumed normal operation. Thank you for your patience.
The fix has been deployed, and the backlogged updates are currently being processed. We expect them to be pushed out within the next couple of hours.
We are deploying the fix and expect the service to resume soon (within 1 hour).