How AI Coding Agents Hid a Timebomb in Our App

Crash reports started trickling in. Users would be working as normal in the app until, without warning, the browser locked up. Behind the scenes, an infinite React component tree was quietly growing in memory, and React 19’s <Activity> was keeping it alive long enough to hide the problem. The culprit? An AI coding agent and a deleted comment. I’ve been building Outlyne , an AI-powered website…