Yes, Janisk, exactly.
I have a situation that I have on one RouterBoard 9 users who watch TV .
7 users watching RTL channel . Of those 7 users who watch RTL channel, one leaves the group RTL (switch to another channel) , then STB sends leave message to RouterBOARD and RouterBoard turns off the stream also to the other 6 users viewing RTL channel, and these 6 users have to re-invite the stream. That is not the case every time someone leaves the channel, but it happens "sometimes" after dozens of transferring/leaving the group, the average 10 breaks per day.
As for the fast leave, you're a little wrong. Fast leave option on RouterBOARD is for purpose of RouterBoard to CORE network (upstream interface) sends leave message (nothing to do with incoming leave messages from the downstream interface), and this bug that I mention happens when CPE equipment (STB, router or PC) Send leave message to RouterBoard where 9 users is connected. It can only be solved if I turn off fast leave on STB, CPE router or PC, and I can't do that so I have blocked on RouterBOARD incoming leave messages on the Ethernet ports where the users are connected. For this reason I had to cut query interval to 7 seconds so that when one user is switching between channels he can't pull 200-300 mbps of stream, because in 2:05 minutes, which is the default interval, the user can switch between 50-60 channels ...
However, fixing this bug in version 6.x is not an option as long as the newly created bug in version 6.x ( Bug in this topic ), where RouterBoard stops working forwarding stream. IGMP messages are passing and the stream comes to the router (on the upstrem interface).
On a couple occasions I mentioned to you that PIM is not an option for me. Most of PON equipment doesn't have PIM Snooping implemented, so that the only option is IGMP.
Given that there's a lot wireless providers in our region which are introducing FTTB service and some of them are planning to use mikrotik equipment in a complete network like I do (not including PON segment), now it would be right time to solve that bug; when on downstream interfaces goes several streams that users are not watching, a couple of times I've written for this bug (from 2011 onwards) and I think I've become boring and dull with that, but I will not give up until you fix it
. That goes in favor for you and me and everyone else who use mikrotik equipment. B.R.