Why does my navigation switch to mobile on a desktop?
Pipeline has collision detection in the header space. If your navigation items are too long and they collide with your logo, the navigation automatically switches to the mobile version. You'll find this happen when you use a device with a small browser width or if you resize the browser window.
In the animation below, you'll see how the red zone, your navigation titles will run out of room when the browser window is resized. At that point, when it collides with the yellow zone, your logo; Pipeline switches menu modes. The reverse occurs as well, when the window is enlarged, mobile view now becomes desktop mode.
Note: If the total width of your menu is greater than the total area allotted to the header - the header will be permanently locked in mobile mode. To prevent your menu from switching on large screens you can nest menu items into a dropdown, use a narrow logo, use concise wording, or move navigation items into the footer.