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#16763 added `onTimeout: "return"` with `timeoutMilliseconds: 10_000` (grammY default). In practice, Telegram's webhook servers abort the read well before 10s when handler latency is LLM-bound: `getWebhookInfo` reports `last_error_message: "Read timeout expired"` and pending updates pile up, cascading into multi-minute reply lag. Reproducible A/B on identical infra (same region, same bot token): - Minimal Python echo bot: 5 back-to-back webhook RTTs 341-642ms, clean. - OpenClaw current main: intermittent Read timeout expired, 1-5 min lag. The handler still runs to completion; only the Telegram-facing ack is sooner. grammY's deployment guide suggests 5s for long-running handlers. No new config surface; minimal one-line change to the existing constant and its test assertion. If a configurable timeout is wanted, that can be a follow-up (see stale #7754).