Put SW Section Divider in the same HubSpot Section and Column as the hero—in the row directly below it—with Position set to Bottom. Do not leave the divider alone in the next Section.
The divider only shapes a band when it shares that band’s drag-and-drop Section.
Correct outline: Section → Column → SW Hero → SW Section Divider (siblings). Set Position to Bottom when the divider sits under the hero. Use Position Top only when the divider sits in the row above the content module (that setting flips the SVG).
Wrong: one Section with only the hero, then a second Section with only the divider.
See the content-tree diagram: Placement in SW Module Documentation.