Return value (auth information) of onAuthStateChanged cannot be obtained only on localohost.

[Yuya]

When I perform a login with signInWithRedirect, I cannot get the value of onAuthStateChanged for localhost only. It is working at the deployed location, and we would be grateful if you could provide a solution here.

https://firebase.google.com/docs/auth/web/redirect-best-practices?hl=ja

1" at  has been carried out, but it does not work.
If anyone knows a solution, I would appreciate it if you could tell us.