iOS 11.3 breaks OAuth flow in PWA ( Add to home shortcut )

Hi Guys,

We are working on converting our web app into PWA.

We are facing the following issue in PWA.

We have OAuth implementation for sign-in into the app.

The OAuth workflow working correctly in Safari browser on iPad iOS11.3.

The issue is OAuth workflow being broken on iOS11.3 when using the PWA after doing Add-To-Homescreen.

Steps:

1) Open the web app in the browser

2) Add the app to the home screen

3) Tapping on the shortcut icon would open the OAuth link in safari browser tab and get redirected back to the browser itself instead of sandbox PWA app.

Could anyone let us know is this a bug in PWA support of iOS 11.3?

Also is there any workaround for this?

Thanks,

Apoorva.