Hi @Jorgen_Dybro,
If you are using Bluesound devices in groups, please note that we’re working directly with their engineering team to resolve an issue with group sync on BluOS-capable Roon devices. The two teams are making progress behind the scenes and will eventually announce a fix here: NAD/Bluesound Grouped Zones out of sync, stopping playing, and/or skipping tracks [Investigating]
Outside of that, I suggest you enable multicast forwarding and IGMP snooping settings on any of the mesh nodes. Try to place the nodes strategically to avoid WiFi passing across known sources of EM interference. Roon’s high-fidelity, lossless protocols have a habit of sniffing out any packet loss that has been lingering in the intranet.