Hi all,
Our Expo app is using Auth0.com and authentication works well in Android, and in most of the iOS devices. However, some iOS devices authentication stops with both Facebook and Google login to attached screen:
To make things confusing, problematic devices range from old iPad2 to iPhone7 and different iOS versions. For other users same phone model and SW version works ok.
In the code, redirect_url is sent to Auth0 and even in failing cases it seems to be correct one. But after process stops in that Safari screen, it never returns to our code.
Not sure if the problem is on the Expo’s side or in Auth0, but would appreciate a lot if you have any advice or even wild ideas what to do? Thanks! 
Ilkka