I have four Chromecast TV devices in my home. The Google Home App on my cell phone picks up all four and I can cast to each one of them with no problem. I purchased a new Samsung Tab A tablet, loaded Google Home, and Goggle Home only sees one and sometimes two of the devices. I say "sometimes" because I have installed and uninstalled Google Home at least 10 times, go through the set up process (Get StartedChooses Account/OK/Location Access/Next/While Using this App/Turn ON Bluetooth/Allow/Looking for Devices/What Are You Setting UP/Chromecast TV/Next/Plug In Your Device/Next). After selecting "Next" the tablet starts looking for Devices and then goes back to the What Are You Setting Up?" Screen. Both my Tablet and Cell phone are on the same network. Not this is the crazy part. Inside of Google Home App, there is an option to launch "Media" When I launch Youtube Music as an option, Google Home's shows three of Chromecast Devices and I can cast to them. This software is clearly not ready for primetime.