Why doesn't intersect faces work with planar faces?

[MikeWayzovski]

@Box

I’m not asking this to find workarounds

I am not showing workarounds, it just illustrates that it could be related to the ‘normal’ of the face, do not shoot me (ssenger)

@Box

I’m asking this as a question to someone who actually works with the code that makes up sketchup, the Sketchup Team for example

I don’t think that the inner code would be exposed or elaborated by team members on this public forum, we as ‘normal’ users can explicate endlessly about certain behavior being a bug or limitation of used algoritmes, though.
@Wo3Dan has a FR regarding the limitations of solids and their faces:

Better Solids and (hopefully) better fill

(The request is at the end! / fill with material) SketchUp Solids can be somewhat buggy. I would like SketchUp to treat watertight shapes with more respect before calling them Solids The program would benefit from doing so in more than one way. Solids need to follow certain rules (watertight, etc.) What is failing is the rule to have all faces in correct orientation. Basically there are only two types of solids: without or with voids: (the ones with holes through still have one surface: se…

I think it is related to the original question.