When the review gate lapsed for a day
Under time pressure I let one session build, self-check and merge a day's work without independent review. It shipped a swipe-to-close gesture, carefully guarded against scroll conflicts. Nobody asked what that gesture throws away. Shortly after, a meal's worth of selected ingredients vanished with a swipe. A cold reviewer asks "what state does this discard?" first. The author does not. Since then the review gate binds every change, small polish items included, and if no reviewer is available the work stops at the open pull request.
Five fixes for the wrong problem
"The screen floats" took five rounds of fixes to page height. Each fix was real and each measurement correct, but none addressed the report. The cause was iOS Safari zooming into text fields smaller than 16 px and staying zoomed, which desktop browsers never show. It surfaced only when I, as the user, described the symptom again from scratch instead of answering "does it still happen?". Now a second round on the same symptom means re-checking the assumption first, and the 16 px rule is an automated test in both apps.