Constant packet loss issues persisting even after ISP switch
I have been having constant packet loss issues for about 2 or 3 months now. It started with xfinity, using their XB7, 1200 mbps down and 10 up, and using ethernet cables. I am now using the BGW210-700, new CAT6 ethernet cables, and have 50mbps down 10 up. I have contacted support and they said that it was a line to modem sync issue, but I never received the new router they said they shipped, and I am not so sure its a modem problem anyways considering this has been happening with xfinitys modem. In game it is only saying 0.02% packet loss, but it has never shown anything below 1% before, and it is affecting the way the game is running. When I test the speed and statistics on my xbox, it shows 1%. It is also happening on my PC. This started happening immediately after my internet was cut on, and has gotten better since then, but it is still an issue. A tech came out and said he could not find an issue and to just try the modem that they sent, but the modem I was supposedly sent is not even in my orders.
I have tried prioritizing the affected devices, opening the ports, using passthrough, disabling the firewall, and disabling IPv6, and none have helped. I have also noticed that while playing, "generic discards" and "Invalid IP packets".
I have yet to find any help with this issue so any help is much appreciated!