We also need the Event Log and the Information screens as requested in this post.
Seems that there are some RF signal issues. Some of the SNR's on some of the downstream channels are low to out of spec. There may be some noise ingress leaking into the line(s) somewhere. I'm going to try escalating your issue to the Comcast corporate employees that are available to these boards. You should get a reply here in your topic.
Hello NicoleG33. I can assist with further troubleshooting your intermittent connectivity issue. I'd like to start with polling the CMTS for real-time and historical RF signal reports from your modem. I can also check your local Node/Plant for any degradation or error reports. Please send me a private message and include your full name and account primary phone number so I can access your equipment.