Bug type

Regression (worked before, now fails)

Summary

I'm experiencing duplicate messages being sent through the Feishu channel. After investigation, I found that the same message is being sent through two different provider paths, causing duplicates.

Steps to reproduce

Configure Feishu as a channel
Send a message to the bot
The bot responds with duplicate messages to Feishu

Expected behavior

Only one message should be sent per response.

Actual behavior

Each response is being sent twice. Looking at the session logs, I can see the same message content is being dispatched through two different API paths:
First path: api: "anthropic-messages", provider: "minimax-portal"
Second path: api: "openai-responses", provider: "openclaw", model: "delivery-mirror"
The second path seems to be related to "delivery-mirror" which is causing the duplicate.

OpenClaw version

OpenClaw version: 2026.3.1

Operating system

macOS 26.0

Install method

No response

Logs, screenshots, and evidence

Session file shows identical message content sent via two different API paths:
Line 794: {"api":"anthropic-messages","provider":"minimax-portal","model":"MiniMax-M2.5"...}
Line 795: {"api":"openai-responses","provider":"openclaw","model":"delivery-mirror"...}

Both entries contain identical text content but go through different delivery paths, resulting in the user receiving duplicate messages in Feishu.

Impact and severity

No response

Additional information

No response