Hi Meta,

I'm currently working with the Messenger API and have encountered an issue with the mid in echo message events, but it only affects one specific Facebook Page. All other pages are working normally.

Scenario:

I send a message from my application and receive a mid associated with that message. When the webhook receives the echo message event for this Page, it contains a different mid, which does not match the one originally returned. This discrepancy causes duplicate message entries in my database since I rely on the mid for tracking.

Questions:

Is there any reason why this issue might only affect a single page, while other pages work as expected? Are there any known configurations or permissions that could impact mid consistency in echo events for certain pages? Any guidance on resolving this would be greatly appreciated. Thank you!