Messages Incorrectly Sent to Previous Channel During Rapid Channel Switching

Problem

An issue has been identified in the 11.10 release involving the experimental feature flag EnableConcurrentReact. When this feature flag is enabled, messages can occasionally be routed to an incorrect channel under specific user interaction conditions.

Symptoms

Users may experience a situation where a message is delivered to a previously viewed channel rather than the current active channel. This occurs when a user:

1. Rapidly switches from Channel A to Channel B.

2. Immediately begins typing upon switching.

3. Sends the message.

Solution

• Workaround: Do not enable the EnableConcurrentReact feature flag in production environments.

• Remediation: If the flag is currently active in your configuration, disable it immediately to prevent cross-channel message posting.

• Fix Status: A permanent fix will be provided in an upcoming patch release.

Configuration Check

To ensure the feature flag is disabled, review your configuration settings for the following key:

{
  "EnableConcurrentReact": false
}