Authentication not working with google app

I am having some trouble in Authentication while using homeServerClientID and same I am able to reproduce in google sample.

Issue is:

Scenario 1: If i have google app already installed

• I tapped signin button from my app
• It open accounts in google app for account selection
• After authentication it switched back to my app
• Getting error in finishedWithAuth delegate method (com.google.HTTPStatus error 400)

Scenario 2: Google app not installed

• I tapped signin button from my app

• It open accounts in safari

• After authentication it switched back to my app

• Worked fine