It’s home network. It just happen every two hours, or less than two hours, my network will be disconnected for 10 or 20 minutes and reconnected back. It also happen when I was playing game online, and it will disconnected from the server, I had to close the game and reopen it, then it works, but after I keep playing for another two hours, and it will disconnected from the server again, and I had to closed and reconnected. After I completed exit the Kaspersky Anti-Virus, and these issues goes away. I had Kaspersky Anti-Virus 21.3.10.391(b) version in my PC.