openclaw - 💡(How to fix) Fix [Bug]: WebChat long reply renders duplicate cards after upgrading to 2026.5.20

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Bug type

Regression (worked before, now fails)

Beta release blocker

No

Summary

Environment

  • OpenClaw: 2026.5.20(升级自 2026.5.7)
  • Platform: webchat(网页端)
  • OS: macOS

Steps to reproduce

  1. 在 webchat 发送一条长消息(触发流式渲染)
  2. 等待回复完成
  3. 观察:同一回复内容出现两张卡片

Expected

单条消息卡片,正常显示一次

Actual

两张相同的卡片同时叠加显示

Additional context

  • 短消息(非流式渲染)正常显示
  • 问题在 2026.5.7 升级到 2026.5.20 后出现
  • 重启 Gateway 和清除浏览器缓存后问题仍存在
  • 降级回 2026.5.7 可临时规避(未实测)

Severity

Medium(影响 webchat 长消息阅读体验)

Steps to reproduce

Environment

  • OpenClaw: 2026.5.20(升级自 2026.5.7)
  • Platform: webchat(网页端)
  • OS: macOS

Steps to reproduce

  1. 在 webchat 发送一条长消息(触发流式渲染)
  2. 等待回复完成
  3. 观察:同一回复内容出现两张卡片

Expected

单条消息卡片,正常显示一次

Actual

两张相同的卡片同时叠加显示

Additional context

  • 短消息(非流式渲染)正常显示
  • 问题在 2026.5.7 升级到 2026.5.20 后出现
  • 重启 Gateway 和清除浏览器缓存后问题仍存在
  • 降级回 2026.5.7 可临时规避(未实测)

Severity

Medium(影响 webchat 长消息阅读体验)

Expected behavior

Environment

  • OpenClaw: 2026.5.20(升级自 2026.5.7)
  • Platform: webchat(网页端)
  • OS: macOS

Steps to reproduce

  1. 在 webchat 发送一条长消息(触发流式渲染)
  2. 等待回复完成
  3. 观察:同一回复内容出现两张卡片

Expected

单条消息卡片,正常显示一次

Actual

两张相同的卡片同时叠加显示

Additional context

  • 短消息(非流式渲染)正常显示
  • 问题在 2026.5.7 升级到 2026.5.20 后出现
  • 重启 Gateway 和清除浏览器缓存后问题仍存在
  • 降级回 2026.5.7 可临时规避(未实测)

Severity

Medium(影响 webchat 长消息阅读体验)

Actual behavior

Environment

  • OpenClaw: 2026.5.20(升级自 2026.5.7)
  • Platform: webchat(网页端)
  • OS: macOS

Steps to reproduce

  1. 在 webchat 发送一条长消息(触发流式渲染)
  2. 等待回复完成
  3. 观察:同一回复内容出现两张卡片

Expected

单条消息卡片,正常显示一次

Actual

两张相同的卡片同时叠加显示

Additional context

  • 短消息(非流式渲染)正常显示
  • 问题在 2026.5.7 升级到 2026.5.20 后出现
  • 重启 Gateway 和清除浏览器缓存后问题仍存在
  • 降级回 2026.5.7 可临时规避(未实测)

Severity

Medium(影响 webchat 长消息阅读体验)

OpenClaw version

2026.5.20

Operating system

webchat(网页端)macOS

Install method

No response

Model

minimax

Provider / routing chain

openclaw->minimax

Additional provider/model setup details

No response

Logs, screenshots, and evidence

Impact and severity

No response

Additional information

No response

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openclaw - 💡(How to fix) Fix [Bug]: WebChat long reply renders duplicate cards after upgrading to 2026.5.20