thanks for help guys but abandonning question
So the failure to forward the packets is certainly because the RPF check failed.
Source: 192.168.50.50/32, Forwarding: 0/0/0/0, Other: 11750/11750/0
Your mroute statement defines where you expect the source multicast to come from. So it would be something like
ip mroute 192.168.50.50 255.255.255.255