Firebase v9 - onAuthStateChanged randomly called with incorrect emailVerified using 'firebase/compat/auth' #5430

Hello,

We recently updated firebase to firebase 9 and we have some issues with onAuthStateChanged callback. We are still using compat libraries for now.

Sometime onAuthStateChanged is triggered for a connected user with incorrect information for emailVerified property/

A simple way to reproduce the bug is to log in and then log user.emailVerified when onAuthStateChanged is updated.

firebaseAuth.onAuthStateChanged((user) => {
   console.log(user.emailVerified)
})

You will find out that this will log "false" for a verified user after a few minutes/hours. This issue seems to happen more frequently when I have connexion stability issues. I could not find a way to reproduce it without waiting...