Slow 5g speed CAX30

Hello, 

I've recently noticed some download issues with my 5g stream. 

My 2.4g download stream has no issues, but the 5g stream will constantly timeout or have speeds anywhere from 80mbps - 130mbps (Getting 900+ from Comcast, modem has no issues)

On my downstreams, the power levels for all channels range from 4.3-7.1, a little high, but early in the week they were 12-14.5s before I had a Comcast tech come out and apply some filters. 

I just recently noticed this issues in the past week and have already tried patching to the latest firmware update as well as factory resetting my modem router, but to no luck. 

Any advice before I have to get a new router or contact support?