In 157e7e0351 edge calculation was updated to
propagate attributes, but the manifold boolean propagates
edge attributes itself. It seems this causes some issues where
boolean attributes get invalid values, which I discovered while
developing #148063. I didn't investigate too deeply because
I'm going to have to restructure this code for #122398 anyway.
Pull Request: https://projects.blender.org/blender/blender/pulls/148096
2deba20912