Your question is Owning a Production Error Incident. 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 owned a production issue caused by asynchronous error handling in a backend service, such as an unhandled promise rejection, server crash, or memory leak. Walk me through how you diagnosed it, coordinated the response, and what you changed afterward to prevent it from happening again.