Same Problem here. Pairing was sucessfull. I've done multiple times a factory reset of Chromecast and Controller. Problem is only on Chromecast, not when playing on the mobile phone with the stadia controller. Buttons work fine in menu. But after starting a game it fails.
Hi @HulkSDL, thanks for posting. Since this is an old topic, please create a new one and describe your problem there so we can help further. Thanks!