This issue has been resolved. All WhatsApp Business API clients in the US region should now be fully operational.
Dec 4, 13:32 PST
WhatsApp implemented a fix and is currently monitoring to confirm that all WhatsApp Business API clients in the US region are back online. We are continuing to monitor the status.
Dec 4, 11:06 PST
We are continuing to monitor this issue.
Dec 4, 08:44 PST
This may result in problems with inbound/outbound messaging for this medium in Sparkcentral. We are monitoring for updates. Please write to firstname.lastname@example.org
with any questions. More information can be found here: https://status.smooch.io/
Dec 4, 08:22 PST