I've been having the same problem for months. Also the be-1-ur22-d.northlake.il.ndcchgo.comcast.net (188.8.131.52) causing the problem.
While I really don't care about this for account reasons (I'm able to VPN through fine) it does affect Xfinity streaming.
I've rebooted my modem, hard reset my router, called Comcast a million times and then of course banged my head on the wall. A technician showed up and didn't know what was wrong.
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