Accessing iframe dont work in chrome 68

[aldarund]

Current behavior:

Error:       CypressError: cy.type() failed because it requires a DOM element.

The subject received was:

  > undefined

The previous command that ran was:

  > cy.wrap()

https://i.imgur.com/QcJULDH.png

Desired behavior:

Work fine like in Electron

Steps to reproduce:

    cy.visit(`https://stripe.github.io/elements-examples/`)

    cy.wait(1000)

    cy.get('.StripeElement iframe').then(function($iframe) {
      const $doc = $iframe.contents()
      cy.wrap($doc.find('input[name=cardnumber]')[0]).type('4242424242424242')
    })

Versions

Cypress 3.0.2
Chrome Version 68.0.3440.75 (Official Build)

[aldarund]

actually adding disable-site-isolation-trials from #1951 (comment) fixes this problem