Using this firmware with a pair of XT8 with AiMesh, I've notice issues with WiFi-calling on iPhone (keeps dropping calls) as well as WebEx and Zoom meeting keeps dropping due to poor connection quality. This is despite being 8 feet from the router with a 500 Mbps down and 20 Mbps up connection. No issues streaming Netflix in 4K HDR. Now if I install the Merlin firmware on my RT-AC68U and use it as the main router with the XT8 as nodes, all these issues go away. Poor WiFi calling was also present on the XT8 with the public non beta firmwares. Not sure how the XT8 function differently as nodes vs main router. All nodes are connected with Ethernet backhaul