Edge Router Lite - Can't ping hosts in VLAN

I am having some issues with my VLAN in my EdgeRouter Lite

Behaviour: 

- When connected to the edge router I can't ping the 192.168.100.103 machine in VLAN 1001 connected to the network.

- The host 192.168.100.103 has internet access.

Anyone any idea what's wrong? How can I ping from e.g. 192.168.1.118 to 192.168.100.103?

With; sudo tcpdump -n -i br0.1001 icmp, I can see the ping requests coming in however they don't get answered.

Config: 

cat config.boot
firewall {
    all-ping enable
    broadcast-ping disable
    ipv6-receive-redirects disable
    ipv6-src-route disable
    ip-src-route disable
    log-martians enable
    name VLAN_1001 {
        default-action accept
        description ""
        rule 3 {
            action drop
            description "Blocking Intranet"
            destination {
                address 192.168.1.0/24
            }
            log disable
            protocol all
        }
    }
    name WAN_IN {
        default-action drop
        description "WAN to internal"
        rule 1 {
            action accept
            description "Allow established/related"
            state {
                established enable
                related enable
            }
        }
        rule 10 {
            action drop
            description "Drop invalid state"
            state {
                invalid enable
            }
        }
    }
    name WAN_LOCAL {
        default-action drop
        description "WAN to router"
        rule 10 {
            action accept
            description "Allow established/related"
            state {
                established enable
                related enable
            }
        }
        rule 20 {
            action drop
            description "Drop invalid state"
            state {
                invalid enable
            }
        }
    }
    receive-redirects disable
    send-redirects enable
    source-validation disable
    syn-cookies enable
}
interfaces {
    bridge br0 {
        address 192.168.1.1/24
        aging 300
        bridged-conntrack disable
        description "Local Bridge"
        firewall {
            local {
            }
        }
        hello-time 2
        max-age 20
        priority 32768
        promiscuous enable
        stp false
        vif 1001 {
            address 192.168.100.1/24
            description "Local VLAN 1001"
            firewall {
                in {
                    name VLAN_1001
                }
                local {
                }
                out {
                }
            }
        }
    }
    ethernet eth0 {
        address dhcp
        description Internet
        duplex auto
        firewall {
            in {
                name WAN_IN
            }
            local {
                name WAN_LOCAL
            }
        }
        speed auto
    }
    ethernet eth1 {
        bridge-group {
            bridge br0
        }
        description "Local Bridge"
        duplex auto
        firewall {
            local {
            }
        }
        speed auto
    }
    ethernet eth2 {
        bridge-group {
            bridge br0
        }
        description "Local Bridge"
        duplex auto
        speed auto
    }
    loopback lo {
    }
}
protocols {
    static {
        route 192.168.100.0/24 {
            next-hop 192.168.100.1 {
                disable
                distance 1
            }
        }
    }
}
service {
    dhcp-server {
        disabled false
        hostfile-update disable
        shared-network-name LAN_BR {
            authoritative disable
            subnet 192.168.1.0/24 {
                default-router 192.168.1.1
                dns-server 192.168.1.1
                lease 86400
                start 192.168.1.100 {
                    stop 192.168.1.199
                }
            }
        }
        shared-network-name VLAN_1001 {
            authoritative disable
            subnet 192.168.100.0/24 {
                default-router 192.168.100.1
                dns-server 192.168.100.1
                lease 86400
                start 192.168.100.100 {
                    stop 192.168.100.199
                }
            }
        }
    }
    dns {
        forwarding {
            cache-size 150
            listen-on br0
            listen-on br0.1001
            name-server 8.8.8.8
            name-server 8.8.4.4
        }
    }
    gui {
        https-port 443
    }
    nat {
        rule 5010 {
            description "masquerade for WAN"
            outbound-interface eth0
            type masquerade
        }
    }
    ssh {
        port 22
        protocol-version v2
    }
}
system {
    host-name ubnt
    login {
    }
    ntp {
        server 0.ubnt.pool.ntp.org {
        }
        server 1.ubnt.pool.ntp.org {
        }
        server 2.ubnt.pool.ntp.org {
        }
        server 3.ubnt.pool.ntp.org {
        }
    }
    syslog {
        global {
            facility all {
                level notice
            }
            facility protocols {
                level debug
            }
        }
    }
    time-zone UTC
    traffic-analysis {
        dpi enable
        export enable
    }
}