Internet Connectivity Dropouts with XB7

I've been having consistent dropouts since upgrading to the XB7.  I use it strictly as a modem and it is in bridge mode.  I've had Comcast service for almost 12 years at my home and have never had connectivity issues until now.  I continue to do some troubleshooting while I wait for a replacement.

While troubleshooting my gateway, I noticed that the LAN Ethernet Port 1 Connection Speed only shows 1000 mpbs when I should have 1200.  Also, I have not noticed any increase in speed when testing with Xfinity Speed Test.  The current measurements all fall within the same speed range that I've always had before upgrading to 1200.

Has anyone else experienced this issue after upgrading from XB6 to XB7?