Pattern Ping Spikes XR1000 Router

I contacted Xfinity and got a rental gateway (modem/router) from them. Sure enough seeing the same sort of latency spikes on their equipment. I have had technicians out here 3 times already and have replaced just about every connector and cable to no avail. I have another appointment scheduled for March 12th, so we'll see what they say at that point, the technicians seem to have done everything in their power at this point to help, so it may be a battle of getting the issue escalated. I have showed the technicians the testing on ping plotter when in my home, hoping this can get to a point where a network engineer on their side reviews the logs and can find and resolve the issue.