CRM 2016 html webresources issue with Chrome

I had a webresource that could access the parent form running in both IE and Chrome when on CRM 2013

After upgrading to CRM 2016, with turbo forms, the code runs well on IE but gets blocked on Chrome.

I tried both window.parent.XRM and  

window.parent.parent.postMessage

IE will run either

CHROME will throw: "SecurityError: Blocked a frame with origin "http://www.<domain>.com" from accessing a cross-origin frame"

has anyone come across that issue?

that should affect