hey guys , do you all got this problem When connecting to VPN through LAN, Ethernet turns off every time.

Unreliable fix I found is to unplug-plug LAN cable quicky while connecting to VPN server in order to successfully connect.

Which VPN service? I've had some weird problems with ExpressVPN and so has another poster here.

Same with me, using nord and vpn unlimited.. On Lan itvwill disconnected but on wifi ok je

Mine is ExpressVPN .. I only have 1 vpn account de ..

Yeah .. Lan will automatically disconnect when connecting vpn .. after I upgrade to android 9 last week till now .

No problems for me using Surfshark on Windows 10 or Android box. For me i turn On Kill Switch if VPN drops. So no VPN connection no internet. Maybe you turned On Kill Switch accidentally. Just check.

Disable the "Kill Switch" option in your VPN app settings.

It's actually a security feature to remove your "Ethernet" route when you connect with your VPN to prevent leakages should your VPN connection fails. That way you won't fallback naked and get your Ethernet line route exposed to authorities/DMCA.