Multiple calls to auth().signInAnonymously() on first authentication creates multiple users

[midrizi]

Same on production, not just on Firebase Emulator.

Demo code:

useEffect(() => {
  auth().signInAnonymously()
  auth().signInAnonymously()
  auth().signInAnonymously()
}, [])

Demo.mov

On second (launch/restarting the bundler) this doesn't happen.

Is this the expected behavior?