sync problem

Hi,
I have 3 nodes

node1
[mysqld]
server_id=1
log_bin=mysql-bin
datadir=/var/lib/mysql
wsrep_node_name=node1db
#log_slaves_updates
wsrep_provider=/usr/lib64/libgalera_smm.so
wsrep_cluster_address=gcomm://node2db,node3db
wsrep_slave_threads=8
wsrep_sst_method=rsync
wsrep_causal_reads=ON
wsrep_cluster_name=percona_cluster
binlog_format=ROW
default_storage_engine=InnoDB
innodb_autoinc_lock_mode=2
innodb_locks_unsafe_for_binlog=1

node 2 e 3 similar the only difference are on wsrep_claster_address and wsrep_node_name and server_id

My problem is when I write something in the database from my CMS of the website, the data is written correctly on the server where I connect but is not propagaded on the other nodes.
Is this normal or is an issue of a bad config? Sorry I’m a newbie.

I resolved. Thanks.