Hi, I'm developing a Messenger integration and everything went good, but suddenly Facebook stopped sending me message_deliveries and message_reads webhooks.

I've set up a webhook endpoint and connected my page to app. Now in my App Settings -> Messenger -> Settings I can see my page under 'Webhooks' section and 4 fields: 'messages, message_deliveries, messaging_postbacks, message_reads'.

I can send and receive messages in both directions, but I'm receiving message_deliveries/message_reads/message_reactions events! Again: it worked, I've implemented support for that, but then something has happened and it doesn't work anymore.

I have permission for the app: pages_messaging

My app id is 815820270053762. Please help me to figure this out, I'm completely stuck with this!