How to catch Sign in with Apple response with browser when iOS signed in with AppleID?

Question

I made login page with "Sign in with Apple" button previously, however its behaviour seems strange and now I'm finding for any solution.

Browser in computer

"Sign in with Apple" jumps to Apple's authentication page.

Browser in iOS (not signed-in)

"Sign in with Apple" jumps to Apple's authentication page.

App in iOS (not signed-in)

"Sign in with Apple" starts iOS native modal to input Apple account.

App in iOS (signed-in with Apple)

"Sign in with Apple" starts iOS native modal to confirm the operation.

[PROBLEM] Browser in iOS (signed-in with Apple)

"Sign in with Apple" starts iOS native modal to confirm the operation, and after that, it never come back to the browser and operation cannot finish....

I use directly the URL https://appleid.apple.com/auth/authorize? with enough parameters. Any suggestion is welcome. I beg your help !!

Answer 1

Excuse me, it's my totally ridiculous mistake.

iOS modal passes only %20 for whitespace character, but it used + instead.

It works now.

Thank you so much for your support !