In this situation, the best approach might be to not use a 'Deformable Part' but rather create a model with two bodies, one formed, one flat, and then assign them to different Reference Sets and simply swap one Reference Set for the other when you wish to show the part crimped or not.
OK, I've created a new part from scratch and it works, sort of. It seems to work fine if you create the part with bend unsuppressed. Then when you add it you can set the suppression expression either way and it seems to work. But if you start with it suppressed, unsuppressing is a problem.
Anyway, check my part (attached below) and see what you think. Your's might behave the same way if you change the model default setting of the suppression status of the Bend feature.