openclaw - ๐Ÿ’ก(How to fix) Fix [Bug]: Control UI double-renders every message response

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The OpenClaw Control UI (dashboard at http://127.0.0.1:18789) renders every assistant message twice in the chat interface.

Root Cause

The OpenClaw Control UI (dashboard at http://127.0.0.1:18789) renders every assistant message twice in the chat interface.

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Bug type

Regression (worked before, now fails)

Beta release blocker

No

Summary

The OpenClaw Control UI (dashboard at http://127.0.0.1:18789) renders every assistant message twice in the chat interface.

Steps to reproduce

  1. Open the OpenClaw dashboard at http://127.0.0.1:18789
  2. Send any message to the agent
  3. Observe: the agent's response appears twice in the chat history
  4. Send another message โ€” the duplicate from the previous response vanishes

Expected behavior

The OpenClaw Control UI (dashboard at http://127.0.0.1:18789) renders every assistant message only once.

Actual behavior

The OpenClaw Control UI (dashboard at http://127.0.0.1:18789) renders every assistant message twice in the chat interface. The duplicate appears immediately after the first, then disappears when the user sends a new message or refreshes the page.

OpenClaw version

2026.05.20

Operating system

macOS 25.3.0 (arm64) / OpenClaw: 2026.5.20 / Node: v24.14.0

Install method

nom

Model

minimax m2.7

Provider / routing chain

webchat โ†’ gateway:loopback:18789 โ†’ agent:main โ†’ minimax:MiniMax-M2.7

Additional provider/model setup details

No response

Logs, screenshots, and evidence

Impact and severity

No response

Additional information

<img width="572" height="445" alt="Image" src="https://github.com/user-attachments/assets/d3a5e2e7-0469-475a-90bc-ffa148717f9a" /> <img width="587" height="707" alt="Image" src="https://github.com/user-attachments/assets/8950d786-e68c-46b4-917a-ff657a4a5975" />

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FAQ

Expected behavior

The OpenClaw Control UI (dashboard at http://127.0.0.1:18789) renders every assistant message only once.

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openclaw - ๐Ÿ’ก(How to fix) Fix [Bug]: Control UI double-renders every message response