Solid difference failure - works in Rhino, falis in Grasshopper

Grasshopper
1

I have an operation in Grasshopper that I can not figure out why is failing.
If I bake the two sets of solids and run the boolean subtract in Rhino, it succeeds. In Grasshopper, the solid difference operation produces a strange result. I have tried adjusting the seams of the generating curves to check for intersecting seam issues and I have checked to be sure there are no co-planar surfaces. I have also checked the document absolute tolerance setting.
the A input is a grafted set of solids, the B input is a flattened set, I want to subtract all of B from each A.

boolean issue.gh (6.0 MB)

2

You can upload files inside of posts in the forum.
Make sure to internalise your geometry

3

upload
upload1323×755 39.8 KB

4

thank you, uploaded file.

5

any info as to why this is failing?