I bought an XR500 router and after setup everything ran beautifully. About a week later, my internet speeds were cut in half. I pay for 300 down 20 up, I'm lucky to get 150 down and 5 up. I have tried just about everything. Turning off QoS, setting Anti Bufferbloat to never, setting bandwidth allocations. None of it works. When I connect directly to my modem, I get my full speeds. I never had this issue with my previous router, Nighthawk R6 (R8000)
Notes: Ping via PingPlotter shows a heavily congested line. WiFi speeds work great.
Any help or insight would be appreciated, else I'm going to have to return it and try a different model/brand.