Health-check prints "cannot fetch metadata. No topics created?" after kafka has been restarted

[fedotxxl]

Hello. I'm testing your health check:

1. Start kafka
2. Start health check
3. It prints 200 {"broker":0,"status":"sync"}
4. Stop kafka
5. It prints 500 {"status": "nook"}
6. Start kafka.
7. Health check still prints {"status": "nook"} and logs metadata could not be retrieved, assuming broker unhealthy: cannot fetch metadata. No topics created?
8. After health check restart it prints 200 {"broker":0,"status":"sync"}

Why is it still has unhealthy state? kafka_2.12-2.2.0