Internet Connection Keeps Dropping

I am having the exact same issue.  Some days everything is fine.  Days like today, it drops every 20 minutes on the nose.  And does this for 10 or so times before it seemingly comes back to normal.  Its always in the middle of the day when I am attempting to work (WFH).  Cox support has advised me to check the coax cables multiple times, check the connection.  I was told my modem was too old, and to replace that.  I did, with a NetGear modem that literally has Cox logo on the box.  Kept happening.  They told me my router was too old, and to replace that.  I did, with a NetGear router.  Now, about every other day, the series of events keeps occuring.  Everytime I contact cox, they start with the same series of questions.  They eventually tell me that its a third party modem and thus I need to contact their support.  When I ask if they see the logs for how often their is a disruption, they tell me that they don't have access to those logs.  It maybe the most frustrating customer service ever - especially, when you come onto the forums and there are post after post with the exact same issue.  Why not just tell me that the nodes are full and they are upgrading?  It would have saved me $300 in upgrades, but alas, this is not what Cox is about.  For the people in this forum, did you get any help solving the problem?  Did the IT tickets referenced by the moderators actually resolve it?  I'm going insane trying to work and have everything stop so often.