failed to validate meta webhook

Hi, i am having a really weird problem i dont know if someone can help me. I have developed my voiceflow bot and want to deploy it to whatsapp. Now, when trying to set up meta's webhook with ngrok, everything worked just fine, however after i did the deploy to digital ocean and trying to validate meta's webhook, i get an error on meta's side.
Tried to debug by making the request via postman and it just validates ok, it seems that facebook for some reason is not making the request onto my new digital ocean url