This problem has been haunting me since release. If the Series X Controller Wireless is used on Windows with Diablo Immortal (which works very well) and then goes to sleep, the Controller will no longer connect. After ‘Controller recognized’ comes ‘Controller disconnected’ immediately. Mind you only after the standby when DI is running. When I exit DI, the controller reconnects. So it’s definitely up to the DI client.
Thank you for the answers. Bye and have fun with DI