Xfinity Internet connection became unstable since 3 weeks ago
I ran into this problem since about 3 weeks ago.
Disconnect at random intervals, about 2~10 mins/time.
Then re-connect (auto or manually) after 3~30sec.
Any troubleshooting on my laptop didn't help.
My friend nearby said he ran into the same problem.
It seemed that this problem came from Xfinity gateway/router.