Now installed applications in TV play media files over LAN with a bit rate above 100Mbps without buffering. The USB adapter takes the IP address, which is manually assigned to the integrated TV adapter, or DHCP, if "automatic" is selected. Almost 900 Mbps up/down speed (between gigabit hosts via gigabit switch), installed in USB 3.0 TV connector. Once or twice a month, when you turn on the network does not appear, the ping to the adapter does not work. I don’t know what the problem is, the adapter or Android, it’s treated by rebooting the TV. Who was able to run a USB adapter on Android 9, share your experience in the comments. It looks like Android 9 does not know about the ID of this adapter model.