Custom HOSTNAME / SCHEME break cookies support

I've build a simple POC showcasing cookies working with the WkWebView (using this plugin). It works great with the default `hostname` and `scheme` (i.e. `ionic://localhost`). However, after changing the `hostname` and/or `scheme`, cookies no longer work.

Here's a the link the [REPO](https://github.com/FarhadG/cordova-wkwebview-cookies) with steps on how to reproduce the issue.

Thank you, in advance, for the help.