state.unreadChannelsStream sometimes returns an incorrect unread message count

[kevingaulin]

Description

I’m using stream_chat_flutter: ^9.14.0 with a StreamChatClient.
When listening to state.unreadChannelsStream, the unread message count is not always correct — sometimes it returns 0 randomly, even when there are still unread messages.

Scenario

Application A: Flutter (Facebook-like app)

Application B: React Native (Messenger-like app)

Both apps are connected with the same Stream user.

Steps to reproduce:

In Application A, I have a deeplink button that opens Application B, showing a badge with the unread message count (e.g., 1).

I click the button → Application B opens.

In Application B, I can see the unread message, but I don’t read it.

I go back to Application A → the badge disappears (count becomes 0).

After some random amount of time, the badge reappears again with the correct count.

Observed behavior

While debugging state.unreadChannelsStream, I noticed that it sometimes emits 0 when switching to Application B (with or without using the deeplink), even though the message was never read.
This happens randomly but fairly often.

Expected behavior

state.unreadChannelsStream should always return the correct unread message count reliably, even when the same user is connected from multiple devices/applications.

Environment

Flutter: 3.32.8

stream_chat_flutter: 9.14.0

iOS / Android: both

Multi-device / multi-application with the same Stream user

Note
This bug seems related to unread state synchronization between multiple simultaneous connections for the same user.

notification_badge.mp4

[xsahil03x]

Hey @kevingaulin , I will test and try to reproduce this and get back to you

[xsahil03x]

Hey @kevingaulin , I am not able to reproduce this at my end. Can you share a sample project which i can run locally to test