Walls created from polygon are misaligned for angled wall joins

[onceadrog]

Archipack version: 2.3.6

Blender version: 2.92.2

Os version: Win10

Description of the issue: Created walls are misaligned to source vertexes when creating walls from polygons, when walls are not squarely joined (e.g. angled join instead)

Curve object selected, note created wall corners are misaligned.

[onceadrog]

Oblique view

[s-leger]

Select both walls, the use "Merge" button in wall parameters.