View the attached images for context.
I moved the top sheet down a little. The ideal loop (frozen) was no longer ideal. Using Auto Structures the top sheet gained another sheet segment. The ideal loop and attached sheets were not moved at all, just the top sheet above.
The question is when is an ideal loop not ideal loop? Is moving other segments supposed to turn ideal loops into non-ideal loops?
The frozen ideal loop was initially found using Remix though I think the size "randomly" increased from 3 to 4 segments later on.