What is the worst production bug you have hit on Cloudflare Workers?

I recently shipped a webhook relay service on Cloudflare Workers and hit some genuinely painful production bugs — the kind where everything looks fine but data is silently disappearing. The worst one: an async function that was not await ed in a queue consumer. In Node.js, the fire-and-forget promise would probably complete. On Cloudflare Workers, the runtime kills the execution context once the handler returns, so the promise just... vanishes. Events that needed retries silently stopped existing. Another fun one: a cron-based recovery system that was supposed to catch exactly these failures — except the cron trigger in wrangler.toml was commented out. The safety net did not exist for months. I wrote up all four bugs in detail here: I Built a Webhook Relay on Cloudflare Workers. Here Are the Bugs That Killed It What is the worst production bug you have hit on Cloudflare Workers (or any edge/serverless platform)? The "distributed systems fail in ways that look like success" category esp