Hey guys! So i picked up a brand new archer AX73 from amazon. Its hooked up to my XB7 (from comcast) using a cat6 cable with the XB7 in bridge mode. However ever since i got it ive had the internet stop working, by that i mean like it wont let any device connect, to having much slower speeds (i get 200mbps out of the 800 i pay for via wifi) and even when hooked up to it and also having really bad ping/lag spikes. But if i switch my XB7 from bridge to normal i get full speed if i connect to the XB7 directly. 

Any help? Thinking of just returning it and get a differnet brand. I even got Homeshield Pro to see if it would help. It says its all perfect after doing its scans.