[firebase_firestore]: Stream does not load value, but future does on web

[Albert-Jan]

Is there an existing issue for this?

• I have searched the existing issues.

Which plugins are affected?

Cloud Firesotre

Which platforms are affected?

Web

Description

After updating Flutter Firestore from version 4.X to 5.X, the web version, the stream no longer emits a value. Downgrading makes the same code work as expected. The future of the same document works without a problem.

Reproducing the issue

Listen to a stream:

Stream<Project> listenProject(String projectId) => _service.doc(FirestorePath.project(projectId)).snapshots().map((DocumentSnapshot<Map<String, dynamic>> data) => Project.fromMap(data.data()!));

Future loads just fine:
Future<Project> getProject(String projectId) async => _service.doc(FirestorePath.project(projectId)).get().then((DocumentSnapshot<Map<String, dynamic>> data) => Project.fromMap(data.data()!));

Firebase Core version

3.1.1

Flutter Version

3.22.2

Relevant Log Output

No error is thrown, even when wrapped with try/catch

Flutter dependencies

No response

Additional context and comments

No response

[TarekkMA]

@Albert-Jan Thank you for reporting this issue. I've replicated the code for the example Firestore app in this branch: issue/13019, and I didn't find any issues. Can you try this branch and see if you still have problems?

[Albert-Jan]

Thanks for your response; I updated my pubspec to rely on the cloud_firestore of the custom branch. I also performed a flutter clean to make sure it was properly compiled.

cloud_firestore: git: url: https://github.com/firebase/flutterfire.git ref: issue/13019 # branch name path: packages/cloud_firestore/cloud_firestore

Unfortunately, it did not work as expected, and the same bug happened. I double checked and downgrading to cloud_firestore: 4.17.4 does work as expected without any code changes.