Internet keep dropping after Comcast Construction

In August 6, Comcast had constuction in our area (West San Jose, CA) to upgrade the system.  However, after that, the internet keeps droping.  It requires manually reboot my Cable mordem.  I called Xfinty and ComCast.  Then they did reboot. The problem dispperead for one day, then it comes back.  I called again, then I got AI response.    It has been for one weeks.  

I have to change to other IP if the problem  is still there.