Of course I did that ...Shaise wrote:
For unfolding to work, you must first select a face that resides on the surface of the flattened sheet, then press unfold button.
Here's an other example: Unfolding 'Bend' and 'Bend001' works, adding 'Bend002' still works (Unfold001) - always selecting the green marked face - but after adding 'Bend003' unfolding fails ... creating the red shape. The same when bending left and right of 'Bend' ...
I realized the issue, when working on that: