Spline mesh incorrect collision visual and navmesh

Spline mesh component is displayed incorrectly with ‘collisions’ enabled in the viewport ‘show’ menu.

Thankfully the actual collision does work correctly in game provided you set ‘use complex as simple’.

EDIT: unfortunately I just found out that this is not just visual, it effects navigation mesh generation as well.

Hello, I have the same problem !
Did you find a solution for this ?