Your question is Debugging Client Integration Issues. 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 situation where you had to debug a complex system integration issue in a client-facing environment. Explain how you isolated the problem, prioritized competing hypotheses, coordinated with internal or external stakeholders, and communicated progress to the client. We are probing for structured debugging, ownership under pressure, and judgment when system boundaries or accountability are unclear. A strong response should use a specific example, distinguish symptoms from root cause, explain the trade-offs behind your actions, and close with a measurable result and lesson learned.