Your question is Debugging Distributed System 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 time you had to debug a complex issue in a distributed system or API integration. Explain how you isolated the failure, prioritized competing hypotheses, collaborated with others, and communicated progress or risk. Focus on your specific actions, the technical and business impact, the final resolution, and what you learned.