This is an issue that's been bugging me for a while and I've not be able to figure out what's causing it. I can't play games with my brother because of really bad lag. I'm pretty sure this started around the time I switched to PC, but it could have also been the fact we got a new router because we were having issues with the old one. I've tried Apex on PC with my brother, Mordhau on PC with my brother, Forza Horizon 4 with me on PC and him on Xbox, CoD MW with me on PC and him on Xbox and all of them lag terribly. When we first got our new Fibre internet about 3-4 years ago there were no issues, 76mbps down, 20mbps up... Absolutely brilliant, we'd play Battlefield 4 no issues for hours on end. Can't do that now and It's pretty annoying. For context, I play wired on PC using a powerline adapter, my brother also uses a powerline adapter for his PC and WiFi for his Xbox. Also, we don't lag when playing alone, or with other people just strictly when we're playing together in the same game. If anyone could give me any suggestions it would be greatly appreciated!