DHCP Lease Renewal only 1h27m every time

I was having frequent internet dropouts, every 1-2 hours after neighborhood line servicing, and after a lot of back and forth with Xfinity and Netgear forum searching, I noticed it corresponded to the lease time on my Orbi router.  I updated the firmware on the Orbi router, and now it is maintaining a connection.  However, my lease times for the last several days continue to be exactly 1h27m.  I've done some wireshark packet analysis, and frequently Xfinity won't ack(nowledge) the DHCP request until seconds before it is set to expire.

It seems that bizarre DHCP lease situations are pretty common on this forum.  Is there anyone that can help me get a longer lease?

Modem: Arris Surfboard SB8200

Router: Orbi RBK750