igmpproxy fail to route after old multicast group is removed from table

[toto456]

Hi, I am using netgate with pfSense v2.4.4-RELEASE-p3.
It has igmpproxy v0.2.1.

I am trying to set up multicast stream with source in LAN and and host client in WAN.
LAN network 10.14.0.0/24 iface mvneta1
WAN network 10.15.0.0/24 iface mvneta2

here is my routes
Routing tables:

Internet:
Destination Gateway Flags Netif Expire
default 10.10.15.95 UGS mvneta2
10.15.0.0/24 link#8 U mvneta2
10.15.0.95 link#8 UHS lo0
10.14.0.0/24 link#2 U mvneta1
10.14.0.1 link#2 UHS lo0
127.0.0.1 link#10 UH lo0
208.67.220.220 00:08:a2:0f:7d:69 UHS mvneta2
208.67.222.222 00:08:a2:0f:7d:69 UHS mvneta2

here is my igmpproxy.conf:
quickleave
phyint mvneta1 upstream ratelimit 0 threshold 5
altnet 10.14.0.0/24

phyint mvneta2 downstream ratelimit 0 threshold 1
altnet 10.15.0.0/24

I have:
- a server in LAN that send multicast on 224.1.1.1 and sending continuously
(it is running iperf -c 224.1.1.1 -u -T 32 -t 3600 -i 1)
- a client in WAN that try try to join that multicast address
(it is running iperf -s -u -B 224.1.1.1 -i 1)

when I start igmpproxy in debug mode, it works fine and table has:

Current routing table (Activate Route):
#0: Src0: 10.14.0.2, Dst: 224.1.1.1, Age:1, St: A, OutVifs: 0x00000002
#1: Dst: 224.0.0.251, Age:2, St: I, OutVifs: 0x00000002
#2: Dst: 239.255.255.253, Age:1, St: I, OutVifs: 0x00000002

my Listener is able to listen to multicast.However if I stop the listener and the sender is still sending, after some time the route to the group is removed:

About to call timeout 26 (#0)
Aging routes in table.
Removing group 224.1.1.1. Died of old age.
Removed route entry for 224.1.1.1 from table.
Vif bits : 0x00000002
Removing MFC: 10.14.0.2 -> 224.1.1.1, InpVIf: 2
MRT_DEL_MFC; Errno(49): Can't assign requested address

Current routing table (Delete Route):
#1: Dst: 224.0.0.251, Age:2, St: I, OutVifs: 0x00000002
#2: Dst: 239.255.255.253, Age:2, St: I, OutVifs: 0x00000002

If I restart the listener, the route will be added without Src:
#0: Dst: 224.1.1.1, Age:2, St: I, OutVifs: 0x00000002
#1: Dst: 224.0.0.251, Age:2, St: I, OutVifs: 0x00000002
#2: Dst: 239.255.255.253, Age:2, St: I, OutVifs: 0x00000002

but listener will fail to get multicast. Only solution to this:

• restart igmpproxy
• or restart multicast source

is it how it is suppose to work?