Move face on bends wont unbend in flattpattern, bug?

Hi,

When i use move face to move a bend i can not unbend it in flattpattern, the bend doesnt even show up in the flattpattern folder. Is this a bug or is it suppose be like this?

I can work around it at the moment, but this seems like this a "half finished" feature from solidworks.

SolidworksSheet Metal