IGMP snooping and AutoRP

Hello

Another (reasonably) tough tshooting ticket:

Logical topology

R5>R8>R10

I turned on autoRP announce on R10 and autoRP discovery on R8. Result? R8 was not getting announce packets from R10. I tried everything then had an idea:

Physical topology is actually

R5>SW1>R8>SW1>R10

I turned off IGMP snooping on interfaces leading to R8 and R10 and R5 on SW1. Everything started working fine.