Hi, I am using Drupal 9 and on a request in network tab jQuery 3.5.1 sends another contextual render call. Any reason of this call?

I am using Drupal 9 and on a request in network tab jQuery 3.5.1 sends another contextual render call. Any reason of this call?

That is the action of module Contextual Links in Drupal core. It call to /contextual/render route for rendered data, then replace them to placeholders on the page.

To see more details what this module does, you can read here.