I just hooked up a Docsis 3.1 MB8600 and so far so good, however, It looks like AQM may be disabled or not configured correctly.
AQM is designed to combat/reduce/mitigate bufferbloat.
Can someone from Comcast confirm it's enabled with their bootfile?
I ran a few tests on DSL reports and it's reporting D to F for 'bufferbloat' with this modem, which is similar to the testing on my SB6121..
I am able to review bootfiles, however, bootfiles from Comcast Business normally only delegate what kind of speeds/services for your account. You may want to contact Motorola. I can check for anything on our end though. Please private message me your full name, the business name and the phone number associated with your account.