Can you guys look at attached WIP6 file. Very simple geometry, four overlapping solids on one side, Boolean into one solid on the other. Please take a closer look at the isocurves after Boolean. Some are broken now.
This is not the first time I came across it. From what I’ve noticed it usually happens after moving solid’s edge or face and if not spotted on time eventually ends up with bad object.
Boolean.3dm (261.6 KB)