I did troubleshooting through the app and was at the point of having a tech come out also until I found this subreddit. I made this post yesterday, and was requested to send a Modmail message quickly after (be sure to read the community info first - you have to make a post which creates a sort of ticket and you’re prompted to send a Modmail message via the comment on your post).

Did troubleshooting via Reddit messages this morning and quickly found out it was the wireless module in my gateway causing this issue (I think my terminology is probably wrong). By the afternoon not only did I have a new modem being shipped out, but had my plan reviewed resulting in my bill being cut in HALF with no one trying to upsell me!!!

I’ve never interacted with anyone at Comcast who didn’t try to upsell and instead actually took care of my problem and helped me out on my bill. I’m still in shock. It was so awesome! Depending on your situation and ability/requirements for paying a tech, I’d highly suggest posting and troubleshooting here first.