Too many errors after changing modem to VR400 v3
Hello, i recently changed my ISP's provided modem(Technicolor TG589vn) to the Archer VR400 v3, hoping to change the locked NAT Type of the first and also get some nice QoS features while keeping the same or slightly lower speeds.Well the first part went okey but after changing, the Modem has too many errors(as u can see on the screenshot) dropping the speed from 29mbps to below 10mbps after a day of full usage.I contacted my ISP and they did a cleanup of my line but the issue still persists and they dont know what is causing it.Any tips to solve it , or it is just incompatibility between the modem and my ISP causing it?
ISP:Nova VDSL 50MBPS in Greece