Hello,
Our app authenticates users through emails:
A user provides an email address to our app and presses submit. Our server sends a sign-in link to that email address with a button containing a universal link. Pressing on the button will redirect the user from their email app (or email opened in safari) back to our app and log them in.
Note: the universal link must be opened on the same device that has our app installed for the redirect to work.
This flow has worked for over a dozen users at our company, each with different devices (physical and simulators). But we are running into an issue during the app review process where the universal link is not working for our reviewer.
We are being rejected with guideline 2.1, stating that they cannot login. The screenshots supplied show that the universal links are redirecting to our webpage instead of the app.
Our team has attempted to reproduce the issue on the same device that has been listed as the test device but no luck. It works for us every time.
They are using an iPad with iOS 15.4.
Hoping that the forums can provide some insight if anyone has run into a similar situation.