1. Network problems: Please make sure that your box is connected to a stable Wi-Fi network. If your network signal is unstable, music playback may be interrupted. You can try reconnecting to Wi-Fi or moving the box closer to the router.
2. Software problem: Check whether your box has the latest software update. Updating the software may fix some errors and problems. You can enter the settings menu of the box to find the update options about the software.
3. Buffering problem: When music is played, the box will buffer the audio data for a period of time before playing. If your box is buffered too slowly or incompletely, the music may be interrupted. Try connecting the box to a faster Internet connection, or try using a Wi-Fi network with a larger bandwidth.
4. resource limitation: if you run other applications or tasks at the same time, it may lead to insufficient resources in the box, which may lead to music disconnection. Please make sure that you don't run other tasks that occupy resources while playing music.
if you still can't solve the problem after trying the above methods, I suggest you contact Xiaomi customer service for further help. They may need further information to diagnose the problem and provide more specific solutions.