Sections Disappearing & Unresponsive On Smaller Breakpoints

Hi. I am new to webflow so I’m probably making an obvious mistake. On Desktop, base breakpoint, everything is fine. When I go to smaller breakpoints, things disappear. Specifically the nav bar but also my “Text-Together-Section” seems to be unreactive. I make it a random color and I don’t see any change.

Side question: You can probably see what I am trying to make but see that I’m doing it wrong. I am trying to make it so my nav bar starts showing up after the top page. I’d like to Nav bar to continue to show for the rest of the home page but it gets pushed up once it touches the next section. How could I solve this? Maybe make it fixed and somehow tell it when to start?

Here is my site Read-Only: