Data loss during the time when one node reboots

HI there,

I have three mariadb columnstore nodes - node1, node2 and node3; and a maxscale mxs1. When a replica node ( say node3 ) is rebooted, I lose data that is inserted/updated by my application during that time it was offline. I thought as node1 and node2 are up, the data will still be inserted/updated into node1 and node2. Later when node3 comes up, it will get synced to node3 as well. But that is not the case. Is it usual? or am I missing something.

Please help.