Something Awful (Top/Bottom Surfaces) is (are) Happening in my Walls

[StillUnnamed 0]

So, this is an interesting issue I've begun encountering while working on some very small airfoils recently. Numerous layers seem to, at random points, appear as top/bottom surfaces instead of the intended walls. I can not fathom what exactly is going on here. Attached is a screenshot showing some of the problem, but it is beginning to cause serious complications due to unnecessary stops and starts. Any suggestions?

 

edit: Added project file. The settings are a mangled husk of the original profile; I threw everything (up to and including the kitchen sink) at this to try and sort it out.
edit 2 10/30/2021 2248Z: Project file fixed.

 

2091233765_awfulafwulsettings.3mf

Edited October 30, 2021 by StillUnnamed

[GregValiant 1,330]

It's a "0" byte file so something didn't go right.

[StillUnnamed 0]

Project file has been fixed. There was some sort of issue when uploading it I think.

[GregValiant 1,330]

Now it's too big.  A 200mb project file?  You can try just posting the STL model file but if it's over 90mb my old laptop doesn't have the horsepower to deal with it.

[nallath 1,124]

Try slicing this with Arachne.