The problem with Ethernet cable is that most is all twisted up inside.  You need to regularly unplug one end from the wall and then yank really hard  on the cable to help the conductors straighten themselves out.  (Thank you BOFH - https://bofh.bjash.com/newbofh/bofh6sept.html )

And, thank you, SGOTI.  Now I need to figure out how to get my Discord Snap to update properly.  :)