Take any restart of 723. Make a cutpoint anywhere (segment N). Attempt to pull any loose end. Segments 1-N will jump sideways out of the protein (even if not being pulled.) Same if you rebuild (even if rebuild is > N).
For fun: Make a cut at 3. Local wiggle 1-3. 1-3 will spin forever. Disable backbone makes it spin smooth and fast.
This is preventing me from using cutpoints normally on this puzzle. I may be able to work around by keeping 1-2 cut.
Using Main client.