Why is orientdb always requesting FULL sync in distributed mode?

If a node is discovered in distributed mode it is always requesting a FULL sync of the database, no matter if it already contains the data or not. Even if I copy the exact same database from one one to the other on filesystem, the full sync happens. Is this expected behavour ? I would expect a delta sync only if some pieces are missing. See the logs of a joining node below:

2020-04-28 07:41:23:719 INFO  [tni-example20-odb-orientdb-1] Current node is a MASTER for database 'example' [ODistributedAbstractPlugin$3]
2020-04-28 07:41:23:732 WARNI [tni-example20-odb-orientdb-1]->[[tni-example20-odb-orientdb-0]] requesting delta database sync for 'example' on local server... [OHazelcastPlugin]
2020-04-28 07:41:23:741 INFO  Direct IO for WAL located in /orientdb/backup is allowed with block size 4096 bytes. [OCASDiskWriteAheadLog]
2020-04-28 07:41:23:742 INFO  Page size for WAL located in /orientdb/backup is set to 4096 bytes. [OCASDiskWriteAheadLog]
2020-04-28 07:41:24:117 INFO  Storage 'plocal:/orientdb/databases/example' is opened under OrientDB distribution : 3.0.27 - Veloce (build e4e73e77074c4f49337ae58b171513cd10ac1157, branch UNKNOWN) [OLocalPaginatedStorage]
2020-04-28 07:41:24:294 WARNI [tni-example20-odb-orientdb-1] Node 'tni-example20-odb-orientdb-1' is NOT_AVAILABLE, the command 'sql.select from OUser where name = ? limit 1' against database 'example' will be executed only on local server with the possibility to have partial result [ODistributedStorage]
2020-04-28 07:41:24:308 INFO  Found 2 records changed in last 2 operations [OLocalPaginatedStorage]
2020-04-28 07:41:24:309 INFO  [tni-example20-odb-orientdb-1] Executing the realignment of the last records modified before last close [#0:11, #0:370]... [OHazelcastPlugin]
2020-04-28 07:41:24:313 WARNI [tni-example20-odb-orientdb-1] Node 'tni-example20-odb-orientdb-1' is NOT_AVAILABLE, the command 'sql.select from OUser where name = ? limit 1' against database 'example' will be executed only on local server with the possibility to have partial result [ODistributedStorage]
2020-04-28 07:41:24:318 INFO  [tni-example20-odb-orientdb-1] Realignment completed. [OHazelcastPlugin]
2020-04-28 07:41:24:321 INFO  [tni-example20-odb-orientdb-1]->[tni-example20-odb-orientdb-0] Requesting database delta sync for 'example' LSN=OLogSequenceNumber{segment=2033, position=13005797}... [OHazelcastPlugin]
2020-04-28 07:41:24:350 WARNI [tni-example20-odb-orientdb-1]<-[tni-example20-odb-orientdb-0] Error on installing database delta for 'example' (err=Requested delta sync with LSN=OLogSequenceNumber{segment=2033, position=13005797} but found the following error: Requested database delta sync with LSN=OLogSequenceNumber{segment=2033, position=13005797} but not found in database) [OHazelcastPlugin]
2020-04-28 07:41:24:350 INFO  [tni-example20-odb-orientdb-1] Requesting full sync for database 'example'... [OHazelcastPlugin]
2020-04-28 07:41:24:354 INFO  [tni-example20-odb-orientdb-1]->[[tni-example20-odb-orientdb-0]] Requesting deploy of database 'example' on local server... [OHazelcastPlugin]
2020-04-28 07:41:29:945 WARNI [tni-example20-odb-orientdb-1] Moving existent database 'example' in '/orientdb/databases/example' to '/orientdb/backup/databases/example' and get a fresh copy from a remote node... [OHazelcastPlugin]
2020-04-28 07:41:29:948 WARNI [tni-example20-odb-orientdb-1] Error on moving existent database 'example' located in '/orientdb/databases/example' to '/orientdb/backup/databases/example' (error=java.nio.file.DirectoryNotEmptyException: /orientdb/databases/example). Deleting old database anyway [OHazelcastPlugin]
2020-04-28 07:41:30:484 INFO  [tni-example20-odb-orientdb-1]<-[tni-example20-odb-orientdb-0] Installing database 'example' to: /orientdb/databases/example... [OHazelcastPlugin]
2020-04-28 07:41:30:486 INFO  [tni-example20-odb-orientdb-1] - writing chunk #1 offset=0 size=8.00MB [OSyncReceiver]
2020-04-28 07:41:33:318 INFO  [tni-example20-odb-orientdb-1] - writing chunk #2 offset=0 size=8.00MB [OSyncReceiver]
2020-04-28 07:41:37:047 INFO  [tni-example20-odb-orientdb-1] - writing chunk #3 offset=0 size=8.00MB [OSyncReceiver]
2020-04-28 07:41:39:296 INFO  [172.17.43.183]:2434 [hz-orientdb-tni] [3.11] Initialized new cluster connection between /172.17.43.183:2434 and /172.17.89.77:60602 [TcpIpConnection]
2020-04-28 07:41:39:841 INFO  [tni-example20-odb-orientdb-1] - writing chunk #4 offset=0 size=8.00MB [OSyncReceiver]
2020-04-28 07:41:42:554 INFO  [tni-example20-odb-orientdb-1] - writing chunk #5 offset=0 size=8.00MB [OSyncReceiver]
2020-04-28 07:41:44:274 INFO  [tni-example20-odb-orientdb-1] - writing chunk #6 offset=0 size=8.00MB [OSyncReceiver]
2020-04-28 07:41:46:291 INFO  [172.17.43.183]:2434 [hz-orientdb-tni] [3.11] 

Members {size:3, ver:3} [
	Member [172.17.17.65]:2434 - c0e7f371-e488-4d36-8ac6-43719c37cbf0
	Member [172.17.43.183]:2434 - 485f48d7-beba-486a-8225-289d095f6cc7 this
	Member [172.17.89.77]:2434 - f427f582-ddd2-454c-93ee-29b5a9cdc090
]
 [ClusterService]
2020-04-28 07:41:47:018 INFO  [tni-example20-odb-orientdb-1] - writing chunk #7 offset=0 size=8.00MB [OSyncReceiver]
2020-04-28 07:41:48:805 INFO  [tni-example20-odb-orientdb-1] - writing chunk #8 offset=0 size=8.00MB [OSyncReceiver]
2020-04-28 07:41:51:509 INFO  [tni-example20-odb-orientdb-1] - writing chunk #9 offset=0 size=8.00MB [OSyncReceiver]

when you restart a node with config “autoDeploy”: true, it will auto re deploy