Postgresql Replica is in sync but repmgr says node unattached

I've set up a replica of a Postgresql instance using repmgr, and the replica is totally in sync with the master instance and have been in sync since some days, but repmgr tells me replica isn't connected. This is what the cluster looks like: postgres@www:~$ repmgr cluster show ID | Name | Role | Status | Upstream | Location | Connection string ----+------------------+---------+-----------+-------------+---------+------------------------------------------------------------------ 1 | orig_master | primary | * running | | default | host=MASTER user=USER dbname=repmgr connect_timeout=2 2 | orig_slave | standby | running | orig_master | default | host=SLAVE user=USER dbname=repmgr connect_timeout=2 This is what we get on the replica instance: postgres@db:~$ repmgr node status Node "orig_slave": PostgreSQL version: 9.6.11 Total data size: 5603 MB Conninfo: host=SLAVE user=USER dbname=repmgr connect_timeout=2 Role: standby WAL archiving: disabled (on standbys "archive_mode" must be set to "always" to be effective) Archive command: rsync -a %p barman@BARMAN:/mnt/volume/prod/incoming/%f WALs pending archiving: 0 pending files Replication connections: 0 (of maximal 6) Replication slots: disabled Upstream node: orig_master (ID: 1) Replication lag: 0 seconds Last received LSN: 63/BB0E3C10 Last replayed LSN: 63/BB0E3C10 Which clearly shows that we have no relpication lag and instances are in sync, and WAL numbers are correct too. This is what I get on the master instance: postgres@www:~$ repmgr node status Node "orig_master": PostgreSQL version: 9.6.11 Total data size: 5603 MB Conninfo: host=MASTER user=USER dbname=repmgr connect_timeout=2 Role: primary WAL archiving: enabled Archive command: rsync -a %p barman@BARMAN:/mnt/volume/prod/incoming/%f WALs pending archiving: 0 pending files Replication connections: 1 (of maximal 6) Replication slots: disabled Replication lag: n/a WARNING: following issue(s) were detected: - 1 of 1 downstream nodes not attached: - orig_slave (ID: 2) HINT: execute "repmgr node check" for more details Which tells me that downstream node isn't connected, which is clearly connected! Now, my question is: Is there actually a problem in replication process? If yes, then What is it and how can I solve it? If not, how can I make repmgr sure that there is no problem? P.S.: Postgresql 9.6.11, repmgr 4.2