Clicking hyperlink in an iframe opens a system browser instead of navigating to it

From Cordova 6.0.0/iOS platform 4.0.0 and newer there is a change in behavior or bug that stops navigating an anchor tag/hyperlink to an external site from working.

If you have an iframe with a page with an anchor tag in which an href that points to for an external domain it will now open it in the system browser instead of loading it in the iframe.
It seems to have something to do how it handles if it’s going to navigate or open in a new browser.
If you have the this in your configuration file you get this behavior:
<access origin="*" />
<allow-navigation href="*" />
<allow-intent href="http:///" />
<allow-intent href="https:///" />
If the allow-intent tags are removed, the iframe will load the page in the href, so it seems like it first checks the intents and if its allowed it is then opened in a new system browser regardless of other configuration.
This is a change in behavior, Cordova 5.4.1/iOS 3.9.2 navigated unless you used InAppBrowser window.open() with target _system to open in the system browser.

I have tried this with and without having Whitelist and InAppBrowser plugins installed, I also tried the Cordova WKWebView Engine and got the same behavior so I think it must be something in the iOS platform.

This issue might be related to the issue reported in CB-10709