When reboot master db node then can not join back to the old cluster

[graywen24]

Hi,
I run the cluster in 3 db nodes. and initially, the replica is 1 then i scale to 3. So 3 db containers running on 3 physical nodes separately without any issue.
later I reboot docker swarm manager also the node1 master db host. then the db cluster can not join back.
Is anyone have this issue?

[graywen24]

my master container MariaDB [(none)]> SHOW GLOBAL STATUS LIKE 'wsrep_cluster%';
+--------------------------+--------------------------------------+
| Variable_name | Value |
+--------------------------+--------------------------------------+
| wsrep_cluster_conf_id | 1 |
| wsrep_cluster_size | 1 |
| wsrep_cluster_state_uuid | 16cd5193-effb-11e9-863a-73c24aa8b78d |
| wsrep_cluster_status | Primary |
| wsrep_cluster_weight | 1 |
+--------------------------+--------------------------------------+
5 rows in set (0.00 sec)

while rest 2 old salves are
MariaDB [(none)]> SHOW GLOBAL STATUS LIKE 'wsrep_cluster%';
+--------------------------+--------------------------------------+
| Variable_name | Value |
+--------------------------+--------------------------------------+
| wsrep_cluster_conf_id | 33 |
| wsrep_cluster_size | 2 |
| wsrep_cluster_state_uuid | ee33b39f-efec-11e9-9238-c2601fccaa4f |
| wsrep_cluster_status | Primary |
| wsrep_cluster_weight | 2 |
+--------------------------+--------------------------------------+