I came across a weird issue recently…
For some reason, after a surface-untrim, the note could not snap onto the face properly.
The note keeps get forced onto the edge for some unknown reason.
This issue got carried forward when the untrim surface is used to form a solid
It seems that when the surface is converted into its underlying 4-sided nurbs surface during untrim, something got messed up.
Any idea what’s wrong? 
Image:
GIF (left is before untrim, right is after untrim):
untrim_note_issue.gif
SWX 2021 files:
untrim_note_test.zip (406 KB)