Tests fail when running all tests at once

[pcrespoo]

Hi everyone! I am facing some issues in the following scenario: when I open Cypress UI and run each test individually, all of them pass, however, when running the same tests at once using cypress run --config video=false --browser chrome , some of them fail. What would be the reason for that?

For clarification, in my recent attempts, I have noticed that for some POST requests, in which I pass a valid JSON as payload, these requests are successfully completed when running them individually, but they fail when running at once, giving a JSON Decode Error and I haven't understood this yet.

Current setup: Ubuntu 20.04, Cypress 11.2.0

Thanks in advance!