Visit a site works on chrome well, but not work on chromeless.(most of time)

Following is example code, it should pop up a model dialog for user input user and password.

    instance.goto 'https://ucenter.jin10.com'

    while not (
      (form=instance.at_css('#J_loginForm')) &&
        (login=form.at_css('#J_loginPhone')) &&
        login.focusable?
    )
      puts 'waiting'
      sleep 5
    end

It works when test with chrome NON headless, but after switch to chrome headless, it almost not working because keep loop and sleep for waiting.

Can you reproduce on this site? thank you.

rubycdp / ferrum

Visit a site works on chrome well, but not work on chromeless.(most of time) #227