Hello, after an upgrade of my internet connection, from 100 speed to 200 fibre to the home speed my TV streams slower, can’t watch anything. The connection is via Ethernet with Cat 7+ cable, tried with WiFi also but nothing changed. Before the upgrade WiFi connection was also not good enough but the ethernet connection was really good. My TV is LG 49UG6407. What can i do? what can i test?

Thank you.