Xfinity Gigabit internet drops to 30mbps frequently

Hello, I've recently purchased an Arris SB8200 and upgraded my service to gigabit speed.

At times, speeds are at 940mbps but very often the connection will drop to 30mbps and stay there. Eventually the speed will rise up again after time or with a reset, but the same issue reoccurs :(. I've had technicians come out to check it out to no avail. Please help! I'll post the modem info below. Thank you!