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openclaw - 💡(How to fix) Fix Telegram messages truncated/split incorrectly in forum topics [1 participants]

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openclaw/openclaw#62036•Fetched 2026-04-08 03:09:57
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DonmeusiDonmeusi
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DonmeusiDonmeusi

Code Example

curl -s "https://api.telegram.org/bot${BOT_TOKEN}/sendMessage" \
  -d "chat_id=-1003768324807" \
  -d "message_thread_id=1270" \
  -d "text=🧪 Trading Bot Test..." \
  -d "parse_mode=HTML"

---

{
  "telegram": {
    "enabled": true,
    "streaming": "off",
    "groups": {
      "-1003768324807": {
        "topics": {
          "1270": {
            "agentId": "crypto"
          }
        }
      }
    }
  }
}
RAW_BUFFERClick to expand / collapse

Bug Description

Messages sent by OpenClaw agents to Telegram forum topics are being truncated or split incorrectly, resulting in incomplete messages arriving in the topic.

Evidence

Test 1: Direct Telegram API (✅ Works)

curl -s "https://api.telegram.org/bot${BOT_TOKEN}/sendMessage" \
  -d "chat_id=-1003768324807" \
  -d "message_thread_id=1270" \
  -d "text=🧪 Trading Bot Test..." \
  -d "parse_mode=HTML"

Result: Message arrives complete and intact in forum topic 1270.

Test 2: OpenClaw Agent via Telegram Plugin (❌ Truncated)

Agents sending messages to forum topics via OpenClaw's Telegram plugin produce truncated messages that arrive in wrong order or incomplete.

Example broken message:

"Du hast recht - ich lese zu viel und antworte zu wenig. Hier ist die Implementierung:"

Message cuts off mid-sentence, no code follows.

Configuration

{
  "telegram": {
    "enabled": true,
    "streaming": "off",
    "groups": {
      "-1003768324807": {
        "topics": {
          "1270": {
            "agentId": "crypto"
          }
        }
      }
    }
  }
}

Environment

  • OpenClaw: 2026.4.5
  • Node.js: v25.8.1
  • OS: macOS 15.3 (arm64)

Related Issues

  • #27157 - Similar issue (closed)

Expected Behavior

Messages sent by OpenClaw agents should arrive with the same integrity as direct API calls.

Actual Behavior

Messages are truncated, split incorrectly, or arrive incomplete.

extent analysis

TL;DR

The OpenClaw Telegram plugin may need adjustments to handle message formatting or encoding to prevent truncation and incorrect splitting of messages sent to forum topics.

Guidance

  • Review the OpenClaw Telegram plugin's message processing logic to ensure it correctly handles long messages and special characters.
  • Verify that the parse_mode parameter is being set to HTML when sending messages via the OpenClaw agent, as this worked correctly in the direct Telegram API test.
  • Check the plugin's configuration and documentation for any settings related to message length limits or formatting options.
  • Compare the message sending implementation in the OpenClaw agent with the working direct Telegram API example to identify potential differences.

Example

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

Notes

The root cause of the issue is unclear, but it may be related to differences in how the OpenClaw Telegram plugin handles message formatting or encoding compared to the direct Telegram API call.

Recommendation

Apply workaround: Adjust the OpenClaw Telegram plugin's message processing logic to match the working direct Telegram API example, ensuring correct handling of long messages and special characters.

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openclaw - 💡(How to fix) Fix Telegram messages truncated/split incorrectly in forum topics [1 participants]