So I have been able to solve this by using this answer: https://stackoverflow.com/a/51706405/5798882
It seems that the default port of :443 needs to be used when deploying, otherwise the PWA won't open as a standalone display. -- You received this message because you are subscribed to the Google Groups "Angular and AngularJS discussion" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/angular. For more options, visit https://groups.google.com/d/optout.
