Our A/B test crashed the checkout page on a busy Monday
We ran a headline test on the product page in Denver and somehow pushed a bad script that killed the buy button for two hours. Traffic was up 30% that day, so we lost real sales, maybe around $4,000 based on our usual conversion rate. I killed the variant within ten minutes once I saw the error logs, then we rolled back to the old version. The lesson stuck with me, so now we stage every test on a clone server before we touch the live site. Has anyone else had a simple test blow up production like this, and what did you change in your review process?