Your question is Debugging a Challenging Bug. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Describe a challenging technical bug you encountered and the steps you took to resolve it.
Explain how you identified the root cause, decided what to investigate first, and collaborated with others if needed. Include the technical and user impact, your specific contribution, the outcome, and what you learned.
