Meta have targeted an edge case that can cause message sending disruptions and have a temporary mitigation for the issue. Meta engineering team is continuing to work on a long-term plan.

Still few customers experiencing some disruption impacting receiving messages on WhatsApp OnPremise API. Meta engineering teams are investigating the issue. We will provide another update within 4 hours or sooner if additional information is available.

Meta is still experiencing some disruption impacting sending messages on WhatsApp On-Premise API. Meta engineering teams are investigating the issue. We will provide another update within 4 hours or sooner if additional information is available.

Recovering from disruptions: On-Premises Solution

Experiencing some disruption impacting Media Upload & Download on WhatsApp On-Premise API v2.47+. Meta has targeted a workaround and will provide another update
Refer for more details

Meta Team is continuing to work on a fix for this incident.