Low DHCP lease times between 1 and 2 hours for WAN. Disconnecting from game services 30minutes/1 hour intervals

Services disconnect every 30 minutes to 1 hour intervals.  

I've experienced this issue multiple times in the last year. The issue will persist for about 1-2 weeks and then stop happening, 4-6 months later it will happen again.  I've experienced it on both the xb7 gateway from xfinity and a G54 surfboard that was purchased earlier this year. The issue corresponds with low DHCP lease times for WAN IP.  

I've contacted xfinity multiple times about this issue and they keep saying nothing is wrong.  They have sent a technician out multiple times that have replaced lines and checked the signal on my devices.  I repeatedly tell them that there is no issue with my signal and the issues seem to be handshakes at certain intervals which is causing brief disconnections.  No one can answer what is causing my DHCP lease times to be so low or point me to a team that could answer my questions.