useSigninCheck suspends indefinitely

I would like to create a protected route with reactfire and react-router-dom. To achieve this, I created a PrivateRoute component as follows:

export default function PrivateRoute(routeProps: RouteProps) {
  const { status, data: signInCheckResult, error } = useSigninCheck();

  if (signInCheckResult.signedIn) {
    return <Route {...routeProps} />;
  } else {
    return (
      <Redirect
        to={{ pathname: "/signin", state: { from: routeProps.path } }}
      />
    );
  }
}

I enabled suspense mode for reactfire. Oddly, when staying on a single page for around ~1min, navigating to another page would cause the component to suspend indefinitely. Reloading the page, however, does momentarily unsuspend the page (but the effect would reappear after idle).

Version info

"firebase": "8.7.1",
"react": "17.0.2",
"react-dom": "17.0.2",
"react-router-dom": "5.2.0",
"react-scripts": "4.0.0",
"reactfire": "3.0.0-rc.2"

Test case

https://codesandbox.io/s/reactfire-suspend-demo-i3j1e

Steps to reproduce

1. Click on Sign in with Google and proceed.
2. You should land in a signed in page with a log out button and a link to test page.
3. Wait for at least 30 seconds (idle).
4. Click on Link to test page (React Router Link)
5. Page would suspend indefinitely.

Expected behavior

Page shouldn’t suspend indefinitely.

Actual behavior

Page suspends indefinitely.

Please let me know if there are any good implementations for integrating reactfire with react-router-dom.

[Zeyuzhao]

@steurt Thanks for the preloading tip. After adding preloading, I haven’t seen any infinite suspense issues.

[steurt]

@Zeyuzhao I just tried it quickly in your CodeSandbox repro, and it seems to solve the issue in the repro as well! No more indefinite suspending.

At the top of App.tsx add:

const preloadSDKs = (firebaseApp) => {
  return Promise.all([
    preloadFirestore({ firebaseApp }),
    preloadAuth({ firebaseApp })
  ]);
};

At the top of the App component in App.tsx put:

export default function App() {
  const firebaseApp = useFirebaseApp();

  // Kick off fetches for SDKs and data that
  // we know our components will eventually need.
  preloadSDKs(firebaseApp);
  
  ...
}

@jhuleatt loading the SDKs using the regular hooks without preloading them seems to cause the indefinite suspending.