EX2300 DHCP-Security

Hi,

I'm installing a few EX2300 and getting a strange/random behaviour with dhcp-security.

For example:
I had a raspberry pi connected (it happens with other devices too) that didn't receive the DHCP offer and there was no entry in show dhcp-security binding for it. I connected my laptop on the same port, same vlan and got a DHCP offer and my mac was listed in the dhcp-security binding list. We have a linux dhcp server, and in both cases I can see the offers being sent by the server.
The DHCP server is connected on a trunk port that is trusted.

Here's sample of my configuration:

interfaces {
  ge-0/0/0 {
	description "Some random device"
        unit 0 {
            family ethernet-switching {
                interface-mode access;
                vlan {
                    members 30;
                }
                storm-control default;
            }
        }
    }
    xe-0/1/1 {
	description "DHCP Server"
        native-vlan-id 1;
        unit 0 {
            family ethernet-switching {
                interface-mode trunk;
                vlan {
                    members all;
                }
                storm-control link-storm;
            }
        }
    }
}
forwarding-options {
    storm-control-profiles default {
        all;                            
    }
    storm-control-profiles link-storm {
        all {
            bandwidth-level 10000;
            no-broadcast;
            no-unknown-unicast;
            no-multicast;
        }
    }
}
vlans {
    vlan30 {
        vlan-id 30;
        forwarding-options {
            dhcp-security {
                group links {
                    overrides {
                        trusted;
                    }
                    interface xe-0/1/1.0;
                }
            }
        }
    }
}

I'm missing something? Some clients are working just fine but others never get response sent by the DHCP server.

 PS: I'm running JUNOS 15.1X53-D58.3

Thanks,
Bruno