openclaw - 💡(How to fix) Fix [Bug] Webchat messages delivered twice — duplicate replies on same session [1 comments, 2 participants]

TL;DR

Investigate and refactor the webchat plugin's message handler to prevent duplicate inbound event handling, likely caused by a race condition between the control-ui route and direct session route.

Guidance

• Review the webchat plugin's code to identify potential race conditions in the message routing logic, focusing on the control-ui and direct session routes.
• Verify the issue by checking the watchclaw log for repeated health check failures and restarts during periods of duplicate message occurrence.
• Inspect the sender metadata to confirm that the duplicate messages are indeed coming from both openclaw-control-ui and the user's session.
• Consider implementing a message deduplication mechanism or a locking mechanism to prevent concurrent processing of the same inbound message.

Example

No code snippet is provided due to the lack of specific code details in the issue.

Notes

The issue may be specific to the webchat plugin's interaction with the OpenClaw platform, and further investigation is needed to determine the root cause. The fact that updating from 2026.4.24 to 2026.4.26 did not resolve the issue suggests that the problem may be more complex than a simple version-specific bug.

Recommendation

Apply a workaround, such as implementing a message deduplication mechanism, until the root cause of the issue can be fully understood and addressed. This is because the issue is causing gateway instability and duplicate messages, which can negatively impact the user experience.