Stair's hidden line squiggly

[DangCad1]

I am trying to place a stair in my floor plan. and want it to show solid lines below the cut and dashed lines above the cut. 

I've chosen "With Break Mark: Visible - Hidden" in Floor Plan Display. Unfortunately, the object seems to have some kind of squiggly line chosen for the hidden part, see screenshot:

If I choose to override object's line types, I can't choose different line types for visibile/hidden - so when I pick solid line there, the whole stairs shows as solid line:

What can I do to fix this? Is there a way to either change the stair objects inherent line types or to choose different line types for visible/hidden when I override the object's line types?

Operating system used: Mac Apple Silicon Sequoia 15.3.1

[Laszlo Nagy · Accepted solution]

Expand the "Floor Plan Display" setting on the left, and under "Grid and Structure", check the various line types settings (see image below) for the Hidden Part (above the Break Mark).

 

[DangCad1]

There it was, thank you!