uiconfig.callbacks are not called for email link sign in method if onAuthStateChanged listener is registered

I am using provider: EmailAuthProvider.PROVIDER_ID with EmailAuthProvider.EMAIL_LINK_SIGN_IN_METHOD and flow = redirect. I register a listener for onAuthStateChanged in componentDidMount and I have
```
uiconfig = {
callbacks: {
signInSuccessWithAuthResult: function(authResult, redirectUrl){
console.log("called success callback");
return false;
}
}
}
```
(other parts of config skipped for brevity)
The onAuthStateChanged listener will be called but the signInSuccessWithAuthResult callback will not. If I get rid of the listener, the callback is hit. This issue only applies to email link sign in- google, facebook, etc[ work fine and call both the listener and the callback.

I need the signInSuccessWithAuthResult callback to take actions that need to happen only once on signup, rather than every time the user logs in/refreshes the page, which is what onAuthStateChanged would get me.

@jhuleatt @wti806 This seems like it might be related to these other issues issues: #67 or https://github.com/firebase/firebaseui-web/issues/656 any thoughts?

@dankawka maybe related to the issue you called in #67 ?