Analyzer output to multiple interfaces issue

Hello everybody,

  I configured an EX4300 switch with an analyzer session whose input are packets entering a particular VLAN and sending those packet to multiple output interfaces following this known workaround: Configuring Multiple Port Mirroring Sessions on an EX4300 Switch

It is almost working, since I can see mirrored traffic on the "hub" interfaces, but is far less traffic compared to the traffic exiting the analyzer output interface. Let's say, on the output interface I see almost 900 Mbps, while on the "hub" interfaces where my analyzer devices are attached I see only 50 or 60 Mbps.

This is how I configured the analyzer:

show configuration forwarding-options analyzer 
MIRROR {
    input {
        ingress {
            vlan GuestVlan;
        }
    }
    output {
        interface ge-0/0/40.0;
    }
}
show configuration interfaces ge-0/0/40 
description "MIRROR OUTPUT INTERFACE";
unit 0 {
    family ethernet-switching {
        storm-control default;
    }
}

show configuration interfaces ge-0/0/41    
description "MONITORING LOOP INTERFACE";
unit 0 {
    family ethernet-switching {
        interface-mode access;
        vlan {
            members MIRROR;
        }
    }
}

show configuration interfaces ge-0/0/42    
unit 0 {
    family ethernet-switching {
        interface-mode access;
        vlan {
            members MIRROR;
        }
        storm-control default;
    }
}

Interfaces from ge-0/0/41 to ge-0/0/47 belong to the MIRROR vlan and are set with the "no-mac-learning" option. The loop link is between ports ge-0/0/40 and ge-0/0/41.

These are the traffic statistics on the interfaces:

show interfaces ge-0/0/40 
...
  Input rate     : 0 bps (0 pps)
  Output rate    : 967054528 bps (202390 pps)

show interfaces ge-0/0/41    
...
  Input rate     : 959416000 bps (250525 pps)
  Output rate    : 0 bps (0 pps)

show interfaces ge-0/0/42    
...
  Input rate     : 0 bps (0 pps)
  Output rate    : 30896064 bps (8170 pps)

As you can see, on ge-0/0/42 the output rate is much lower than what is seen on ge-0/0/40.

Any idea? Thank you in advance!