AIDA's Settings AI Features form blocked Save with a "Select a model" error right after switching providers. The real defect sat two React commits away, inside a hidden native select Radix uses to bridge into native form submission — and it never raised an error of its own.
An AI agent blamed a failing Playwright test on Next.js response caching. I traced the code and blamed middleware. We were both wrong about the observation: the test's "anonymous" context was quietly authenticated. Two stacked bugs, two confident stories, and the re-run as the only reviewer that counted.