Description

After updating to OpenClaw 2026.2.26, messages sent by the agent on Telegram now stream in real-time (new feature!), but some messages appear briefly and then disappear, being replaced by an envelope icon (📩).

Steps to Reproduce

1. Update to OpenClaw 2026.2.26
2. Have the agent send messages via Telegram channel
3. Some messages — particularly those where the agent also uses the message tool in the same turn — appear momentarily, then vanish and are replaced by an envelope/mail icon

Expected Behavior

Messages should remain visible after streaming completes.

Observed Behavior

• Message streams in (visible text appearing word by word)
• Message disappears
• Replaced by a small envelope icon
• Also observed: NO_REPLY token leaks into streamed messages (the gateway doesn't filter it from the stream, only from complete messages)

Environment

• OpenClaw version: 2026.2.26
• Channel: Telegram
• Previous version (2026.2.24): Messages arrived as complete blocks, no disappearing behavior
• Streaming appears to be newly enabled in this version

Screenshots

Envelope icon replacing message:
(User reports messages vanishing and being replaced by an icon)

Additional Context

The streaming feature itself is great — just needs the edge cases fixed around message finalization and NO_REPLY token filtering.