Endless loop when receiving comments

[JeremyKj87]

• A motivation for this change, e.g.
  • Fixes Post.get_comments() creates an infinite loop, fetching same comment #1017 Same comment being scraped hundreds of times in some posts #1143 Endless loop when receiving comments #910
  • More general:
    There is currently a problem with Instagram that sporadically the comments do not come to an end and can be scraped endlessly.
    The has_next_page-flag (inside the request response) is always true although the comments are repeated.
    This error does not always occur, but mainly with larger profiles and the consequence is that you quickly run into an HTTP 429 Error (Too Many Requests).
    The problem can also be reproduced in the browser

Test data: https://www.instagram.com/p/CVyEdhbIXPG/

• The changes proposed in this pull request

• change the nodeiterator next method to check if the response is the same than before

• The completeness of this change

  • Is it just a proof of concept? It's just a poc
  • Can we help you at some point?

[Thammus]

The change looks good and works fine 🌈. Many thanks for fixing this recurring bug 🙂