Does the Deco M9 support IGMP snooping/multicasting? I have BT TV and it was working fine with my deco M9 mesh network until some time in March. BT have advised that it is related to the router and IG

Hi all, Have just changed my setup from AP Mode to Router mode using Deco M5. I'm finding out all sorts of little idiosyncrasies like not using 1.1.1.1 as a DNS if you have a Yale Smart Sync system. C