Your question is Leading a Complex Debugging Effort. 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).
Tell me about a time you had to debug a complex software issue that was affecting users or a critical workflow. How did you approach isolating the root cause, coordinating with others, and driving it to resolution?