Pool & members showing up in active LB but in standby it is showing down.

I am seeing one pool & its pool member is showing up on active load balancer but on standby it is showing down. Both devices are in sync. On standby pool, session monitor is not showing. Is this some configuration issue or issue is from server end

tmos)# list ltm pool ent-abc-ghaw-389_pool
ltm pool ent-abc-ghaw-389_pool {
    members {
        10.140.10.14:ldap {
            address 10.140.10.14
            session monitor-enabled
            state up
        }
        10.142.102.37:ldap {
            address 10.142.102.37
            session monitor-enabled
            state up
        }
        10.142.102.47:ldap {
            address 10.142.102.47
            session monitor-enabled
            state up
        }
    }
    monitor tcp
}
====================

session monitor is not showing. This is config on standby device

mos)# list ltm pool ent-abc-ghaw-389_pool
ltm pool ent-abc-ghaw-389_pool {
    members {
        10.140.10.14:ldap {
            address 10.140.10.14
            state down
        }
        10.142.102.37:ldap {
            address 10.142.102.37
            state down
        }
        10.142.102.47:ldap {
            address 10.142.102.47
            state down
        }
    }
    monitor tcp
}