No internet connection when connection via wire Ethernet

Libreelec LE 8.2.3.1 installed on SD card. I got an issue: no internet connection when connection via wire Ethernet. Connection via WiFi works normally.

The difficult parts is there is no any visible or obvious errors shown, internet just not work. Although, in System menu some IP address is displayed 168.254.x.x but this seems is internal IP that Libreelec assign when no connection. Its a very nasty bug, as wired connection provide much better speed.

Mbox H96-II, 2GB RAM 16GB ROM

LibreELEC-S905.arm-8.2-8.2.3.1

This wire connection issue is solved: when Mbox wired connected directly to cable modem via a network switch, then, for some reason, it can't get DHCP and assign IP address, hence no Internet connection. When Mbox wired connected via the router, it get LAN IP address and network connectivity.