Update xfinity router to xb8

I have an XB6. It’s been ok until recently. The frequency of this problem has increased over time. In the last week or so I am having to manually reboot the router, a couple times a day. 

The issue is lost  access to the internet. Checking for outage there isn’t one. I used to be able to disable WiFi on my phone, then open the xfinity app to reboot. Now that this is happening multiple times a day the xfinity app says the router is not responding and to do a manual reset. 

The router is 2 feet off the ground and has clearance all around it for proper ventilation. 

Feels like it is nearing its end of days so I’d like to get upgraded to the xb8 before this xb6 is unusable.

Thank you, Gary