We rolled back a version change to our SIP infrastructure earlier today around 10am PT and since then have seen stability.

We will update here with a more complete timeline and RCA tomorrow.

The issue has come up again. We are working with our SIP infrastructure provider to resolve.

We cutover to a previous deployment and are seeing improvement. We are continuing to monitor and will provide an RCA later today.

We are investigating an issue with our SIP gateway. We will update this thread with more information.