Kubernetes Network Policy - Allow specific IP
In your policy as it is right now, you are allowing ingress from that CIDR, except for all traffic from your <MY_IP>. So it is blocking all traffic from your IP.
PS: Source IP preservation is disabled by default for Ingress in IBM Cloud Kubernetes Service. Make sure you've enabled it for your Ingress service: https://console.bluemix.net/docs/containers/cs_ingress.html#preserve_source_ip