When watching a video using the ‘DS Video’ app on the Xiaomi Mi Box, the network was disconnected, which was inconvenient. The same symptom occurred even after changing the video player to another one. Other apps, such as YouTube and Netflix, did not experience network interruptions.
The cause I found today was a router problem. I used ‘Smart Connect’ of the ASUS router, and this was the problem. ‘Smart Connect’ is a function that can use 2.4GHz and 5GHz frequencies with the same SSID. It is assumed that the network is disconnected when this frequency change occurs in ‘DS Video’.
After disabling the ‘Smart Connect’ function on the router, there has been no network disconnection problem so far.