AP Isolation is just that; each device is isolated from all other
devices. In effect, each device is on its own WiFi network. It's
appropriate to use if you're a hotel or some place where each guest
needs to be kept unaware of everyone else on the ne...
There are different reset procedures for the different generations of
Chromecast. They are all documented on the How to factory reset your
Chromecast Chromecast help page.