Chrome Version       : M55

There has been a user feedback spike for #issue>WebContent>Performance>403Error. Feedback levels have increased by 74% since 1/10 to 1/12 

Users are reporting Error403 when trying to access websites. Examples include, 

https://apply.expresspros.com/account/login?ReturnUrl=%2f
http://www.ebay.co.uk/
https://www.paypal.com/
http://www.ole.com.ar/


I cant reproduce the problem locally

Link to feedback spike in Pulse: https://goto.google.com/ebdsv

Link to feedback reports with screenshots: 
https://goto.google.com/lrcem
https://goto.google.com/vrpnb
https://goto.google.com/axxse
https://goto.google.com/tissr

What is the expected result?
Page displays with no Error 403

What happens instead?
Error 403 is displayed to users