ERL-3: upnp2 no longer working after upgrade from 1.8.5 to 1.9.0

I just upgraded to 1.9.0 and upnp2 no longer works.  Before I start, I've made NO configuration changes other then the firmware upgrade.  I'm using upnp for exposing my plex media server to the internet. 

This is the state I found upnp2 rules in:

$ show upnp2 rules
Firewall pin holes
pkts bytes target prot opt in out source destination
NAT port forwards
pkts bytes target prot opt in out source destination
0 0 DNAT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:12830 to:10.0.0.11:32400
0 0 DNAT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:24488 to:10.0.0.11:32400
0 0 DNAT tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp dpt:14263 to:10.0.0.11:32400
$

I attempted to restart the plex media server a few times and each time it added two or three more "NAT Port forwards" to the list. I also restarted the edgerouter and the same thing kept happening.

So I downgraded back to 1.8.5 and restarted plex media server and everything was now fine:

$ show upnp2 rules
Firewall pin holes
 pkts bytes target     prot opt in     out     source               destination
    4   216 ACCEPT     tcp  --  *      *       0.0.0.0/0            10.0.0.11            tcp dpt:32400

NAT port forwards
 pkts bytes target     prot opt in     out     source               destination
    1    60 DNAT       tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            tcp dpt:16352 to:10.0.0.11:32400
$

As I said above, I have NOT change any configs at all..  Here are my upnp2 configs:

    upnp2 {
        listen-on eth1
        listen-on eth2
        nat-pmp enable
        secure-mode enable
        wan eth0
    }

I saw that the upnp2 dameon was upgraded to a newer version as part of the 1.9.0 release, so I'm guessing this is related to that.

 Thoughts?