I've created an Angular 6 PWA hosted on Firebase. I'm seeing the correct version of the app in Safari on my iPhone. However, when I add the app to home screen (make standalone), an older version is getting installed instead. The home screen app never updates. I've deleted the app from home screen multiple times and re-installed from Safari and am still getting the older version. I've even gone so far as to delete all previous versions of the app in Firebase yet the older version of the app keeps getting installed.
What cache is Safari using to install the app on the home screen? Why is the PWA app itself not updating at all? Please help.
Thanks for your time.