Repro Steps:

1) Ensure you have a vector graphic available both open in-application (Illustrator or Affinity Designer), and that you also have a copy of the same vector graphic as an SVG Export.

2) Create a Page
3) Place a Viewbox on the Stage
4) Copy-Paste your vector graphic from the original application, into the Viewbox

Observe how the graphic does not get placed within the Viewbox.

5) [Right-Click] on the Viewbox created in Step 3).
6) From its context menu, select "Import SVG" and navigate to the location of the SVG version of the vector graphic.

Observe how the SVG is imported without issue.

Expected Results: Vector Graphics can be copy-pasted directly from a vector editor, into a Viewbox Element type.