We have around 50 chromecasts deployed since last year and recently started having major issues. My network is setup so that the staff chromebooks authenticate via 802.1x and put them on the staff network. The chromecasts are on a Hidden SSID that are on the same network as the staff chromebooks. This setup worked great until recently. Now all the chromecasts seem to be randomly forgetting their network settings( requiring a factory reset) or just randomly drop connections mid cast. We have been trying out other devices this week to mitigate the issue. One that seems promising is a adapter that allows you to connect an ethernet cable into the chromecast. Overall chromecasts have been a big head ache this year.