Fixing a Multi‑Year Production Bug

Overview

For years, customer service representatives struggled with a critical UI bug in the claims system: when opening the claims form, only half of the screen displayed. The form was long, and navigating it became slow, frustrating, and inefficient. Despite repeated attempts by multiple teams, no one could resolve the issue because it never occurred in the test environment.

The Challenge

• Bug reproduced only in production, never in test or QA environments.
• Multiple engineering teams attempted fixes over several years without success.
• The issue became normalized and accepted as "just how the system works."
• Hundreds of customer service reps lost time daily due to half‑screen rendering.

My Approach

Instead of approaching the problem as a traditional coding defect, I analyzed the entire system workflow. Since the UI loaded correctly everywhere except production, the cause had to be environmental or process‑flow related.

1. System‑Level Investigation

• Mapped the full process before and after the affected screen.
• Compared production workflow logic with test environment behavior.
• Identified a transition condition unique to production that altered how the UI rendered.

2. After‑Hours Deep Dive

• Took on the investigation outside of regular work hours to avoid delaying project commitments.
• Replicated environment differences locally to isolate the true trigger.

3. Root Cause & Fix

• Discovered a process‑flow mismatch that only occurred in production.
• Adjusted system logic to correctly render the full‑screen form.

Testimonial