Bug type

Regression (worked before, now fails)

Beta release blocker

No

Summary

OpenClaw send message with big file via wecom show error: gateway timeout after 10000ms

Steps to reproduce

Run the following command in the Linux Terminal (the attach file is about 10M) :
openclaw message send --channel wecom --target XXX --message "hello, this is the result file" --media /home/cyc/.openclaw/workspace-worker/tmp/FT200C1211_20260429.zip

OpenClaw version: OpenClaw 2026.4.15 (041266a)
wecom-openclaw-plugin version: 2026.4.27

Expected behavior

file send successful

Actual behavior

Screen output is in the following:
14:38:26 [plugins] hook runner initialized with 1 registered hooks
14:38:26 [plugins] hook runner initialized with 1 registered hooks
│
14:38:31 [bedrock-mantle-discovery] Mantle IAM token generation unavailable
◇
Error: gateway timeout after 10000ms
Gateway target: ws://127.0.0.1:18789
Source: local loopback
Config: /home/cyc/.openclaw/openclaw.json
Bind: loopback

OpenClaw version

2026.4.15

Operating system

Debian11

Install method

No response

Model

qwen3.5-plus

Provider / routing chain

openclaw

Additional provider/model setup details

No response

Logs, screenshots, and evidence

Impact and severity

No response

Additional information

No response