When using the iOS OAuth2 library, getting an odd issue where, after signing in and using my 2FA code, I get the permissions page. Fine. On that page, it lists permissions then I click 'Allow'. So far so good. But after clicking 'Allow', it doesn't dismiss the webview or even redirect to a blank screen. Just hangs. From Xcode, hard to see if Google has issues the redirect URL with a code or error.