OAuthService(accessToken, idToken, claims) returns null after Google OAUTH2 Authentication is Success.

[anand-sakthivel]

Describe the bug.
OAuthService(accessToken, idToken, claims) returns null after Google OAUTH2 Authentication is successful. After manual refresh above values are populated.

Stackblitz example
N/A
Followed I Video in YouTube: https://www.youtube.com/watch?v=r4USQN5VnmY
Duration: 31:39

To Reproduce
Steps to reproduce the behavior:

1. Using Google Identity Provider for authentication.(Created ClientId & redirect uri is HTTP://localhost:4200/fallback)
2. Following initLoginFlow() & loadDiscoveryDocumentAndTryLogin() login page flow.
3. I access localhost:4200 to get to the login page. When I click the login button, I can see the Google login page.
4. After successful login google redirects to HTTP://localhost:4200/fallback
5. Inside FallbackComponent(mapped /fallback path to FallbackComponent), I'm getting some log details like (OAuthService(accessToken, idToken, claims)), and it's null, But when I log sessionStorage the above value is not null(Proper login values like access token, id token claims, etc..).
6. After manually refreshing the page HTTP://localhost:4200/fallback , I can see the log details with value OAuthService(accessToken, idToken, claims).

Expected behavior
What I expect is, After successful login in the redirect page without refreshing the page I should see the OAuthService values.

Desktop (please complete the following information):

• OS: [Windows ]
• Browser [chrome]
• Version [Version 131.0.6778.266 (Official Build) (64-bit)]

Additional context
Add any other context about the problem here.