The citus cluster has collapsed

For an unknown reason, the cluster stopped working.
His condition is:
**Coordinator:**
nodeid groupid nodename hasmetadata isactive metadatasynced shouldhaveshards
54 11 worker21 TRUE TRUE **FALSE** TRUE
**51** 12 **worker23** TRUE TRUE **TRUE** TRUE

pg_dist_node is locked by ExclusiveLock with process without pid (because of that it is not possible to do anything with metadata: meta sync for example )
It is advisory lock - I do not now how to kill that lock ?

**Worker21:**
nodeid groupid nodename isactive metadatasynced shouldhaveshards
54 11 worker21 TRUE TRUE TRUE
**51** 12 **worker22** TRUE TRUE TRUE

the worker22 is not active (existing) worker.
postgres log: WARNING: connection to the remote node worker22:**** failed with the following error: server closed the connection unexpectedly

**Worker23:**
nodeid groupid nodename isactive metadatasynced shouldhaveshards
54 11 worker21 TRUE **FALSE** TRUE
**51** 12 worker23 TRUE TRUE TRUE

It is possible build the cluster?