I clean up after I have the setup flowing. Column-30 is 3rd column, in the 3rd row. If you go to any of the lower breakpoints, and try to hide it, it doesn't work. .
It hides for me here. But you are not hiding Column-30, you are hiding text-3, column-25 and text-10. When those are hidden, you are then displaying content found in Column-36 (the 2 elements inside of there have no class names).
You need to get those class names under control.