Note: If I switch the IPs in the command like this:
:duplicate{dst=http{mux=ts,dst=192.168.3.15:8551/},dst=http{mux=ts,dst=192.168.1.15:8551/}}
VLC now publishes again ONLY on the first IP (adapter), in this case 192.168.3.15:8551
Could anyone please help here?