The issue is now resolved.
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Post Mortem:
Issue description and impact:
On 14.03.2024 at ~16:30 we received reports from some Cloud API customers that messages and status webhooks were not arriving.
Cause of the issue:
We identified the cause of the issue as a recent deployment of a new Meta feature (phone number webhook) that was not working as described.
Mitigation Steps / Summary:
We rolled back the deployment reverting all numbers to a functioning state. This rollback was completed by ~18:40
Prevention of recurrence & suggestions:
We have completed an internal review with the relevant teams and
made changes / improvements to how we test and deploy new features from Meta.