wide-dhcp-client

I have a Ubuntu VM sitting behind the Netgear CCR running wide-dhcp-client. The following is the config.  It should do 2 things.  1. pull a DHCPv6 address for the upstream interface eth0. 2. Pull a delegation and apply it to eth1.

interface eth0 {
	send ia-na 1;
	request domain-name-servers;
	request domain-name;
	script "/etc/wide-dhcpv6/dhcp6c-script";
	send ia-pd 1;
};
 
id-assoc na 1 { };
 
id-assoc pd 1 {
	prefix-interface eth1 {
		sla-len 16;
		sla-id 0;
		ifid 1;
	};
};

 What I get is, a /128 assigned to the eth0 and nothing on eth1.  Based on what I have read here, I should be able to pull a delegation like this, but it is clearly not working.

Any suggestions?