Issues in MySQL Cluster Replication lost some record when restart SLAVE SQL_THREAD (1 reply)

Hi ALL

Our system have 4 server running Mysql Cluster, and 1 server running mysql slave replicating with 1 Mysql API node.
Daily in maintenance time we stop SLAVE SQL_THREAD to backup database and start again SLAVE SQL_THREAD after backup finish. But some time Mysql slave has been lost some record from Master.
I checked log of Mysql cluster and Slave but don't found any Error. Status of Mysql slave is yes on both Slave_IO_Running and Slave_SQL_Running.

now i don't know how to investigate about this issue.

Please help.