: PartDesign - Inconsistent handling of multiple pieces
It's possible to create parts using normal PartDesign tools, which have multiple unattached pieces (for lack of a better word), but the current iteration of PartDesign only seems capable of handling parts with single pieces. So, some pieces get thrown away, leaving only one of the pieces in the 3D view.
Steps To Reproduce
Open attached document, change the depth of the pocket from 9mm to >=10mm. Observe that one end of the box disappears.
Instead, either the two end pieces should remain (preferable in my opinion), or the user should be informed that this is an error and the change in pocket depth shouldn't be allowed.
Related ticket: issue #1601