Just upgraded my Xfinity home internet to 600mbps. Xfinity wifi router shows 575mbps. Nest Wifi only shows me 90mbps using fast.com. My Nest WiFi is several years old, yesterday I bought a New Nest WiFi for another home. Decided to test the new nest. Same result. I enabled Bridge Mode on xfinity Router, no change. Testing the Mesh shows no issue. I set custom DNS using google DNS ( ipv4 and ipv6) no change. Turned off privacy cloud services, no change. Speed test using Google Home app matches fast.com. router Software version 14150.43.81 point software version: 1.54.294928 system firmware versions.: 294928. any ideas?