Weekly Incident · Oct 12, 2026
The payment that charged twice after a timeout
A timed-out payment is retried, but the provider records two charges for one order.
JavaScriptHardAbout 35 minutes
A curated Buglyst lab with executable checks. Fictional scenario; no live production system.
Your investigation
Follow one operation across a timeout and retry.
A customer is charged twice after checkout briefly times out.
- Inspect the incident evidence and files. Reproduce the failure.
- Fix the cause. Run Checks, then Submit for private validation.
- Return here for the free debrief and a different exercise using the same skill.
This multi-file lab is free with an account. Want a shorter first try? Try a guest lab.
The debrief
Accept a fix in this incident using your Practice account, then return here. The debrief is free; Run Checks alone does not unlock it.
One investigation at a time
The next curated edition is scheduled for Oct 19, 2026 (UTC). Bookmark Weekly Incident for the latest brief.
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