Interface -i ... switch does not work correctly.

[CpServiceSpb]

There is Ubuntu18.04 x64 and 1.8.3.1 wsdd2 version.
There are lan0 and wa0 interfaces.
While wsdd2 -i lan0 starts I see:

connected_if: lo: if=127.0.0.1 sc=192.168.0.80 nm=255.0.0.0
connected_if: wan0: if=55.66.77.88 sc=192.168.0.80 nm=255.255.255.248
connected_if: lan0: if=192.168.0.254 sc=192.168.0.80 nm=255.255.255.0
connected_if: lo: if=127.0.0.1 sc=192.168.0.80 nm=255.0.0.0
connected_if: wan0: if=55.66.77.88 sc=192.168.0.80 nm=255.255.255.248
connected_if: lan0: if=192.168.0.254 sc=192.168.0.80 nm=255.255.255.0
connected_if: lo: if=127.0.0.1 sc=192.168.0.80 nm=255.0.0.0
connected_if: wan0: if=55.66.77.88 sc=192.168.0.80 nm=255.255.255.248
connected_if: lan0: if=192.168.0.254 sc=192.168.0.80 nm=255.255.255.0
connected_if: lo: if=127.0.0.1 sc=192.168.0.80 nm=255.0.0.0
connected_if: wan0: if=55.66.77.88 sc=192.168.0.80 nm=255.255.255.248
connected_if: lan0: if=192.168.0.254 sc=192.168.0.80 nm=255.255.255.0

Also there is Iptables with rule allowing outgoing multicas traffic from lan0 interface and no rule to allow it from wan0.
And when wsdd2 starts error is appeared:
wsdd2[22074]: error: wsdd-mcast-v4: wsd_send_soap_msg: send: Operation not permitted

Is it correct behaviour or incorrect that is issue ?