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AI Code Recovery

AI-generated checkout code crashing mobile browsers

How we isolated a catastrophic React rendering issue caused by AI-generated code and restored a failing e-commerce checkout before Black Friday traffic hit.

100%
Uptime restored
<2h
Resolution
-85%
Cart abandonment

A retail client used an AI code generator to rapidly build a custom React checkout flow ahead of Black Friday. Initial testing looked fine, but real-world traffic exposed serious structural problems inside the generated state logic.

Under load, the checkout repeatedly triggered unnecessary component renders, causing massive browser memory spikes and eventually crashing mobile sessions entirely. We isolated the exact failure point, rebuilt the unstable state logic, and restored the checkout before the client’s largest sales campaign went live.

React
Platform
Render loop
Issue type
1h 45m
Recovery time
Mobile
Devices affected
The Problem

AI-generated React logic caused checkout instability

The generated checkout flow passed basic tests, but real traffic exposed runaway state behaviour. AI-generated useEffect dependencies continuously triggered updates, which caused the browser to re-render critical checkout components until mobile sessions froze or crashed.

The challenge was isolating the exact failure without taking the full checkout offline during a commercial deadline.

Infinite render loop

AI-generated useEffect dependencies continuously triggered state updates, causing endless re-rendering.

Browser crashes on mobile

Memory usage spiralled under traffic, freezing checkout sessions for approximately 40% of users.

Revenue impact

Cart abandonment rates exploded less than 48 hours before the client’s largest sales campaign of the year.

The Fix

Targeted React refactor without rebuilding the checkout

We profiled the checkout flow in real time, traced the render behaviour, and surgically rebuilt the unstable logic instead of rewriting the entire system.

The fix focused on removing generated logic bloat, correcting dependency arrays, and stabilising the state changes that controlled checkout progression.

Isolated the failure point

Used React profiling tools to identify the exact useEffect hook causing uncontrolled state recursion.

Rebuilt unstable dependencies

Refactored dependency arrays, reduced redundant state updates, and removed AI-generated logic bloat.

Deployed production hotfix

Clean build pushed to production within 1 hour and 45 minutes of the emergency escalation.

Results

Checkout restored before launch traffic peaked

The checkout was fully stabilised before launch traffic arrived. Mobile crash rates disappeared completely and conversion performance returned to expected levels.

Most importantly, the client avoided catastrophic downtime during the most commercially important weekend of the year.

0
Downtime required
100%
Stability restored
Record
Weekend sales

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