Tested in:

- Google Chrome Version 58.0.3029.81
- Google Chrome Version 60.0.3080.0 (Official build) canary (64 bits)

I /think/ you're saying that your "Go" button triggers a navigation without adding the current page to the History list? But the other pages in the back stack remain available to the back button-- the browser just skips over the "missing" entry?

This would appear to be the same behavior provided by the standard window.location.replace() function, right?

The window.location.replace() function has the same behavior in all browsers.
In the report, this behavior only occurs in Chrome (not in Firefox, not Vivaldi, not Safari ...)

Re #3: Can you confirm that the behavior you're reporting in this issue is the same behavior exposed by the public API? 

If so, then this will be converted over to a regular functional issue rather than a security issue.

I confirm it

Also, I can change the function open by replace and the same thing still happens:

1- in chrome the navigation history page is lost
2- in firefox, safari, vivaldi is not lost.

Example:

function go() {
	var url = 'https://www.google.com', iframe = '<iframe src="'+url+'" style="border:0;width:0;height:0"></iframe>';
	document.write(iframe);
	setTimeout(function(){
		setTimeout(function(){
			window.location.replace(url); /* same behavior as: window.open(url,'_top'); */
		},0);
	},0);
}

Unfortunately, the reproduction webpage (http://createcharts.esy.es/delete-history-back.html) is no longer available.