No news on topic? TP-LINKers, shame on you!

Region : Russia Model : TL-SG5412F Hardware Version : V1 Firmware Version : latest ISP : Guys, can't make this switch transparently forward multicast packets. I don't want to set up igmp snooping or...

Sorry. but we can't do factory reset 'cos we already are using the switch in prod environment. Why on Earth couldn't you test it in your labs, dear TP-Link engineers? :-)