@Maissid, Please have your device run three traceroutes. One to google, yahoo, and a server of your choice. Please respond back with the full traces so we can compare results. -Allan, Cox Support Forums Moderator.
I've noticed some home routers will deny multiple ICMP pings running at the same time. I believe this is a resource protection feature. The same thing happens on my unifi USG. As long as when you're running one traceroute it doesn't have loss it's probably fine. Really the most important hop is the last one. Some of the middle hops with drop ICMP because of prioritization. You could even try it without the router connected directly to modem.