`w3c: true` broke entering key combination (like [:control, ‘a’])

???? Bug Report

Enabling w3c: true will not allow pressing key combination like [:control, 'a']

To Reproduce

require 'selenium-webdriver'

def browser_action(w3c_disabled)
  caps = Selenium::WebDriver::Remote::Capabilities.chrome
  caps['chromeOptions'] = { w3c: w3c_disabled }
  service = Selenium::WebDriver::Chrome::Service.new(path: '/tmp/chromedriver_80.0.3987.16')
  webdriver_options = { options: Selenium::WebDriver::Chrome::Options.new,
                        desired_capabilities: caps,
                        service: service }
  driver = Selenium::WebDriver.for :chrome, webdriver_options
  driver.navigate.to('https://github.com/login')
  driver.action.send_keys([:control, 'a']).perform
  value = driver.find_element(:xpath, '//*[@id="login_field"]').attribute('value')
  driver.quit
  value
end

puts "With w3c disabled: #{browser_action(false)}"
puts "With w3c enabled: #{browser_action(true)}"

Result

With w3c disabled: 
With w3c enabled: a

This is simplified test example, but this problem actual for web apps which support hotkeys (for example selecting all files on web document manager)

Environment

OS: Kubuntu 18.04
Browser: Chrome
Browser version: 80.0.3987.116-1
Browser Driver version: 80.0.3987.16
Language Bindings version: Ruby 2.6.5p114