I have a new AC68U. Works fine, but I've noticed that when I connect my phone (Pixel 3, if it matters) on the 2.4GHz band, it doesn't show up in the active device list even though it is using the WiFi. Similarly, when I change my MacBook to the 2.4GHz band, it shows up as a wired connection. Both devices show up properly when connected to the 5GHz band. Am I doing something wrong? Firmware up to date.