OpenWRT - Multicast traffic only working one way over a VPN. Help please

I have an IPsec VPN which is Vigor <=> Openwrt routers.
I use Strongswan for the VPN. IGMPProxy for multicast.

Multicast traffic is working if I send from Vigor to the OpenWRT router. but I cannot get multicast traffic to go from the OpenWRT router to Vigor.

Openwrt has a WAN of and LAN | eth0.2 WAN / eth0.1 LAN
Vigor is WAN and LAN

IGMP Proxy I just have atm as
eth0.2 Upstream -

Do I need some static route added to push multicast from the OpenWRT Lan > WAN?