Ever since 11/23/24 My Internet Drops at random, for a short time. Issue still not fixed after speaking to agent on phone...

Well subject is mostly all there is but here's some more.. Been Xfinity customer for 23 years (ever since I lived in my current place) . On the scale of those years their service has been very reliable with only half a dozen times that stick out (plus this one) over those 20+ years.  I said that to illustrate how abnormal this is...until 11/23/24 it was 3 years since I had intermittent issues.  The drops are random....and sudden...meaning its not like the warning is "oh no suddenly service is slow"....no its like "everything is good everything is good...NOTHING".... then it will restore just as suddenly , usually in 5 - 15 minutes, although the first time on the 23rd that was out for like 35-40 minutes.

Besides just the fact I want it to stop doing this for the sake of paying money for a service and wanting that service to not be bad, but I work remotely oncall every six to seven weeks, and my next time is the week before Christmas. If this service keeps dropping then that could put in a bad spot. I support Doctors and Nurses. Some of their locations are an hour plus drive from my home if I can't help them remote.

I was on the phone with a live Xfinity support agent this past Monday, he thought it was the modem so he priority shipped me a new one. It came Wednesday (12/4) and while there wasn't any issues Thursday...it started dropping yesterday Friday 12/6 (dropped at 5:15 pm to 5:30 pm, then again 5:45 pm to 6:oo pm), then today Saturday 12/7 4:04 pm - 4:06 pm and then again 5:35 pm to 5:38 pm and finally 9:39 pm to 9:41 pm. 

I can easily tell because all my shows/movies are streamed, I don't have cable from Xfinity just Internet.  So if I'm not working on the computer I'm playing a game or I've got the TV streaming something...so tis easy to tell when it drops.

I don't know what is causing this ... obviously but it I can tell you I changed NOTHING about my setup, my router, didn't touch the coax cables, didn't play around with router settings or anything of the sort. just BAM out of no where this is now a recurring problem.