Logged Out Immediately After Login? Third-Party Cookies May Be Disabled

You log in.

It looks successful.

Then suddenly — you’re logged out.

Or the page reloads and asks you to log in again.

Sometimes it works for a second.

Then it breaks again.

This isn’t your password.

This is a third-party cookie issue.

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This Isn’t a Login Failure — It’s a Cross-Site Cookie Problem

Many modern websites don’t handle login on a single domain.

They use external authentication systems.

That means your login session depends on third-party cookies.

If your browser blocks them,

the login process breaks after authentication.

So you get logged out immediately.

If this is happening,

third-party cookies are likely disabled.

Try this:

If login works there but not in your main browser,

your cookie settings are blocking cross-site data.

Don’t keep retrying login.

You need to allow third-party cookies.

Do this:

Once enabled,

the login session will complete properly.

Browsers are getting stricter about privacy.

Many now block third-party cookies by default.

This breaks login systems that rely on external services.

So even if your account is fine,

the session can’t be maintained.

They think their account is broken.

So they:

But none of that fixes cookie restrictions.

The issue is not authentication.

It’s blocked cross-site session data.

If you’re logged out immediately after login, stop retrying. Enable third-party cookies — that’s what keeps the session alive across domains.