Can't ping active LTMs self ip or floating ip

I'm experiencing the same issue where I can't ping the active or floating IP and only standby IP is pingable. The issue is reversed when I failed over. The response provided above is not relevant as I'm pinging from a host in the same vlan and the fact that it is reachable to the standby self IP shows that there's no network issue. Does anyone know how to fix the problem. Thanks