I have three of these units in mesh system in 5000 sf two story home. I have recently had connection issues and looked on ASUS app to see signal strength of my iPhones and MacBooks - all connected to 5gHz band only. Best signals are -50 and they often get in the -70s, even when I am right next to one of the routers. Might there be interference causing issues? Cable company installed a new router (in bridge mode) which has interfered with 2.4 gHz devices. Unfortunately I cannot turn off that WiFi because it is needed for TV stb’s.