We have an Extrude that references the edge of a quilt by using the PROJECT command in sketcher.
When we flip the direction of the quilt and then flip the extrude the feature fails. If we do an edit definition of the sketch in the Extrude and then click OK, it works again!
PTC R&D says this is a 'limitation of the software'. 😭
The official word is:
“The limitation is that the edges formed a counter-clockwise loop at the time of creation. So now when they go clockwise the software considers this inside-out contour and changes the material side of the extrude. The software does not recompute the orientation to preserve the user intent.”