Can Ping Internet from 1 of IPs on Interface, Can't Ping from the Other

Hi All,

I have an SRX240H2 connected directly to the internet. I have an interface configured for a couple of addresses. I want to be able to reach the internet from this device, from a particular subnet, so I configured that subnet for primary preferred on the interface:

ge-7/0/0 {
    unit 0 {
        family inet {
            no-redirects;
            sampling {
                input;
                output;
            }
            address 1.1.1.1/30;
            address 2.2.2.2/29 {
                primary;
                preferred;
            }
            address 2.2.2.3/29
            address 2.2.2.4/29
}

When I try to ping 8.8.8.8, I am unable to receive a response:

PING 8.8.8.8 (8.8.8.8): 56 data bytes

--- 8.8.8.8 ping statistics ---
2 packets transmitted, 0 packets received, 100% packet loss

However, when I ping it from the address configured as primary and preferred it works:

ping 8.8.8.8 source 2.2.2.2
PING 8.8.8.8 (8.8.8.8): 56 data bytes
64 bytes from 8.8.8.8: icmp_seq=0 ttl=61 time=2.272 ms
64 bytes from 8.8.8.8: icmp_seq=1 ttl=61 time=1.912 ms

--- 8.8.8.8 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 1.912/2.092/2.272/0.180 ms

It looks like my "Primary" configuration on the device is not working properly.  Am I missing something?

Thanks,