After waiting, cypress test runner displays 404 page error

[scrumvisualize]

In my php web application, there is a page where I perform search for some details and click on some button will display a dialog box.
On click on "OK" button in the dialog, system trigger a 'POST" request first.

common/ajax/startProcess.php (POST)

After sending the POST request, system start sending the "GET" request continuously, later after 35 seconds system display the whole data in a page.

common/ajax/showProgress.php?processingName=quickstudentsOnline&companyID=2
common/ajax/showProgress.php?processingName=quickstudentsOnline&companyID=2
common/ajax/showProgress.php?processingName=quickstudentsOnline&companyID=2

In order to test the above case, I have created below route, but after waiting for some time in cypress test runner it displays a 404 page error ! I have test this manually and it looks good, it displays data after 35 seconds.
Does anyone experience similar behaviour in latest cypress version ? I have tried both in chrome/electron

Settings:
cypress version: 6.1.0
Windows 10 operating system
chromeWebSecurity: false
cypress-cucumber-preprocessor

before(() => {
    Then('I should heavy load the routes', () => {
      cy.intercept({
        method: 'GET',
        url: '**common/ajax/showProgress.php?processingName=quickstudentsOnline&companyID=2**'
       }).as('getQuickStudentRequest');
    })
})

Then('I start the process', () => {
    cy.wait('@getQuickStudentRequest', {timeout:35000});
});