Strange behavior on web chatbot but works correctly on python script on terminal

I'm using IBM Watson services to create a web chatbot. The chatbot works perfectly on the terminal but when I use the same python scripts for the web bot some of the answers are displayed correctly but for others the chat restarts as if something crashed and then the welcoming message from the first dialog node of the Watson Assistant appears.

I tried looking on the console of my browser to see if there was an error but no error shows up. How could I proceed to figure out what's going on? Why would it work partially correct on the web and completely fine on the terminal if the code is basically the same thing? I have not even a good idea of what to ask since the error is so puzzling.