Your question is Address System Design Flaw. 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 identified a flaw in a system design and the steps you took to address it. Explain how you assessed the risk, communicated the concern, and influenced the resulting decision or remediation. Focus on your individual ownership, the trade-offs involved, and the measurable outcome.