Setting emulator port for Firestore and Database not working

[eljass]

Version

@nuxtjs/firebase: 8.2.2
firebase: 9.9.2
nuxt: 2.15.7

Reproduction Link

Steps to reproduce

// nuxt.config.js
const { NODE_ENV, FIRE_EMULATOR } = process.env
const isDev = NODE_ENV === 'development'
const isEmulator = FIRE_EMULATOR === 'true'

export default {
...
  firebase: {
    ...,
    services: {
      auth: {
          persistence: 'local',
          initialize: {
            onAuthStateChangedMutation: null,
            onAuthStateChangedAction: 'auth/ON_AUTH_CHANGED',
            subscribeManually: true,
          },
          ssr: {
            ignorePaths: ['/api'],
          },
          emulatorPort: isDev && isEmulator ? 9099 : null,
      },
      firestore: {
        memoryOnly: false,
        emulatorPort: isDev && isEmulator ? 8080 : null,
      },
      functions: false,
      storage: true,
      database: {
        emulatorPort: isDev && isEmulator ? 9000 : null,
      },
      performance: false,
      analytics: false,
      remoteConfig: false,
      messaging: false,
      terminateDatabasesAfterGenerate: true,
    }
  },
  ...
}

What is Expected?

It should be possible to set the port for each service seperately.

What is actually happening?

Setting emulator port in both configurations, firestore and database results FIREBASE FATAL ERROR: Cannot call useEmulator() after instance has already been initialized. on SSR.

This can be fixed by removing the emulatorPort field from database, and it will use an emulator, but according to docs, this should not be the case.