Receiving Twilio messages from a shortcode in a webhook instead of phone number

I have managed to set up my Twilio account (and a Flask server) and while following along the How to Create a SMS Conversation in Python tutorial I'm receiving the response message from a shortcode instead of my assigned Twilio number (see below).

I would like to receive messages from my Twilio assigned number and not from a random shortcode. Is there a setting in the Twilio console to achieve this? (Other users have posted similar questions, but so far I haven't found any solution to this.)

I'm able to send and receive messages and the webhook is properly configured, but when I receive the message, it is from shortcode 50000 instead of my actual Twilio number.

SMS Response from webohook

Any help would be appreciated. Thanks!

Summarizing the comments above as an answer:

This is likely related to the messaging route used when sending messages between different country codes. You should try using numbers from the same country and consider using a shortcode available for their country. Twilio support suggested trying a Mexico - Short Code - SMS type for the specific case mentioned.

There's more context in this answer.