TV can't connect to the internet for 30 minutes at the same time every day

Yes I am still having the issue.  It seems to happen everyday between 8:30 and 9 AM.  It lasts for 15 to 20 min, then everything works normally.

This just started occurring over the past few weeks.  When it happens, it affects all TVs.  We haven't changed TVs or cable boxes for a couple of years.

Clearly xfinity is sending a signal or fixing something on their end and refuses to admit it.

I think you may be on to something, especially if this is affecting all of your TVs at the same time. If you have the X1 system, it's normal for your primary cable box to perform a routine system update every 24 hours. That update can be scheduled for any time of day you like by going to Settings>Preferences>General. Is this connection issue happening outside of the daily update schedule?

This is not that.  All boxes updated between 2-3 am.  When this happens the TX show continues to play.  If you try to change the channel you get a message that the internet is down when it isn't.  Just discovered today there is a modem or router in the cable box.  Was told there was "leakage" on the line.  Field take cam out, checked everything, and said there is no leakage.  Call again and they say there is leakage.  One rep said all of this was wrong and that changing my cable box would fix things.  Got a new box from the store and still have the same issues.  Everyone at Comcast keeps pointing the finger at someone else while I spend hours on the phone and nothing gets fixed.

Thank you for that additional information, this does help. The equipment does update nightly, by default the time is set between 3:00am - 4:00am local time, and during this update period the equipment may lose functionality and restart. You can change this time of course: https://comca.st/3bfVSHH

The X1 system does rely on the internet, however as stated, each device does have a modem built in as well, separate from your residential internet connection. We also perform regular maintenance to our services during off-peak hours, generally between the hours of 2:00am - 6:00am, when viewership and usage is at it's lowest. During this time, services may be affected as well. We work hard to minimize service losses during peak hours by performing this maintenance nightly.

I hope this helps provide some insight to the service issues, though I'd be happy to review the account specific and check for technician notes, as well as any maintenance referrals specific to the account. 

Brie,

I tried to send you a message and you do not show in the direct to be able to send you a message.  Lots of Comcast name show, but no ComcastBrie.  Tried clicking your name and there is no way to send a message that way either.