In the test version, the messaging_postback function of the webhook is not working. It was functioning perfectly until a few weeks ago. Although I can see that I passed the payload to the button through messaging_echo, I do not receive any response through the webhooks.
Can anyone help with this? What could be causing the error?

I noticed that when I sent a template message to an end user, I got a response as the message was sent, but the user gets a message after 1-2 min. I tried to send 10 messages to a number with high speed Internet and all messages are delayed without any reason. Is anything need to rectified from our side to deliver message without any delay?

I have a test app on developer mode and I want to test out my webhooks for page. I've build my endpoint and tunnel it to ngrok. Page subscription works well but when it comes to testing, it doesn't hit the endpoint at all.

After press submit facebook login pop up redirects to a blank page and shows the error on the image.

Hi, we cannot create Video carousel items with user_tags. product_tags do work.
Example payload we use:
{
"is_carousel_item": "true",
"media_type": "VIDEO",
"video_url": "URL_TO_VIDEO",
"user_tags": "[{\"username\":\"cristiano\"}]"
}
We get this error:
user_tags is not a valid parameter for the media type, VIDEO.
All other formats (Image, Image Carousel Item, Reel) with user tags are working.
Do you have any hint?