Thanks for the reply.
So I have installed the update to the theme and it appears to be working fairly well, but there are still some issues that I am not sure about.
When in the editor, I cannot see one of the icons. I have checked, and tried to reload it, but it still just appears as a box instead of a pen (see screenshot 1).
Also, I have duplicated a section to then hide 1 of the duplicated sections for desktop, and hide the other for mobile (see screenshot 2). If you look at the screenshot you will see that the breakpoints indicate that it should be hidden at this size. However, from the screenshot you can see that it is still visible.