Just an update on my end, I've disabled the 5Ghz band for almost a week now and have not had any problems. My Android devices are still connected to the WiFi and am using my Chromecast. Of course,...

brab84 wrote I'm starting to think that issue comes from Android 8.1. It's happening since i updated my Nexus 6p to it. Indeed also some netgear devices seem affected: https ://...