cy.visit does not send headers / change HTTP method when baseUrl contains `:80`

Current behavior:

cy.visit({ url, method, headers }) does not appear to honour the method, or headers

Desired behavior:

cy.visit({ url, method, headers }) should send the specified method and headers.

Steps to reproduce: (app code and test code)

cy.visit({ 
  url: '/ui', 
  method: 'POST',
  headers: {
    'mock-user': JSON.stringify(mockUser)
  }
});

I include an annotated Cypress debug log:

Changing the method to GET still results in the headers not being sent

Versions

I tested Cypress 3.4.1 and 3.2.0. Ubuntu LTS Chrome 77

UPDATE: Cause tracked down to: https://github.com/cypress-io/cypress/issues/5367#issuecomment-542329058

[cypress-bot[bot]]

Released in 3.6.1.

[flotwig]

Ugh, that definitely sounds possible. The cy.visits are cached by URL, maybe we’re keeping the default port when storing the response but not when pulling it back out, or vice versa. Thanks for tracking this down, this should be pretty easy to fix now.