Tor relay appears offline in Metrics after some times

Since at least December 20, my relay appears offline in Metrics after few hours to few days (typically between 3h to 3d). In nyx, all flags disappears. After restarting the service, flags are coming back after few hours and the relay appears online again. There is nothing in the log.

My fingerprint: 33D88F331408141F2A2CC563239E54E48F7A211B Notice that this happens to at least another person, its fingerprint DAA806E9529D77EF94685FC0E513386EF65B83F8

Trac:
Username: clement