Repro Steps:

1) Create a Page
2) Introduce an Ellipse to the Page's RootGrid, and make an oval shape (for example, 400x256)
3) Convert the Ellipse to a Path via its context menu, by navigating to 'Path'->'Convert to Path'.
4) In the Path's properties Panel, set its Origin to Centre, and rotate it by 30°.

Observe that the Stroke is fully visible when zoomed-in.

5) Right-Click on the Path, and from its context menu, navigate to 'Path'->'Flatten Transform'

Observe that the bottom, and top Strokes of the Path are clipped by its rectangular bounding box.

Expected Results: The Stroke of a Rotated Path does not get clipped by its bounding box when flattened. As in all other instances of bounding boxes, its total area should be inclusive of the Stroke/Thickness featured in the Path.