Hi krass, I've attached a version here where I repaired a messed up trim boundary in this area:



And I also found 5 very skinny surface fragments where the surface was compressed all the way down so they were like a line instead of having any surface area. Surfaces that are squished down to no surface area can cause problems with some of the mechanisms that traverse faces to gather up all the adjacent outside or inside faces. I removed those as well.

I think this version should behave better.

- Michael