I use Cypress 9.5 to test application in Angular 13. As a backend I have local server in PHP.
I have bunch of tests. When I run them in browser they all pass several times. When I run in headless mode they fail quite randomly. In both cases I use built-in electron browser.
In my tests I have log in as command using cy.request and storing required user data in sessionStorage. Then when I want to visit main page - login dialog appears.
How can I debug this to find a root cause?
Hint: watching videos from tests I can observe big lags in refreshing rendered image comparing to real browser.