This incident has been resolved.

The root cause impacting webhook systems has been resolved. All postbacks are firing at regular rates. Customers may experience some delays as we push through the queued webhooks from ~4:00PM PT. We will continue monitoring this system for any issues.

Engineering has isolated the root cause and we are continuing work to restore realtime postbacks and webhooks.

Since 4pm PT, we have stopped realtime publishing of postbacks / webhooks from our system for Tune and Custom / Commerce events. We are currently investigating the root cause for the delays, and will continue updating.