Facebook Messenger bot not sending messages in order

Question

I\'m playing around with building a simple Facebook Messenger chatbot and I\'m having trouble sending messages in sequence.

In the example above, it should

Answer 1

I added a messageId counter to the app that resets to 0 on every start of messagehandling. Then I delay with that number * 100 ms. This way I can add intentional delays as well with code like messageDelay += 15

receivedMessage(event) {
  messageDelay = 0;
  //...

sendMessage extend:

function sendTextMessage(recipientId, messageText) {
//...
  setTimeout(function() {
    callSendAPI(messageData);
  }, messageDelay++ * 100)    
}