In addition to the switch I would check the WiFi access points as well. Some products can get really touchy when multicast is involved as it’s something that can kill a wireless network. Some manufacturers sneak changes to these settings (or behavior) into firmware updates (I’m looking at you NETGEAR!) so it would be worth checking the entire network. In some cases a change in firmware on one device can cause it to get into a multicast fight with another.
In general disable IGMP snooping on the switches and any “UPnP” settings on the access points, switches, and router.