I've just received my hub 4. The switch from Hub 3 to Hub 4 was fairly swift and most smart devices connected to the wifi at 2.4 GHz. However I have a set of smart led strip lights that just wouldn't connect. I have followed various suggestions on this forum i.e., set up a separate 2.4Hz wifi, manually set the channel to 11 instead of auto, played around with the "wireless mode" and "channel width" settings, still no luck. When I use a 4G hotspot instead of Wifi, the lights connect fine, but when I use wifi, the app just wouldn't recognise the lights.