Eagle might remember. There was a member here who had all of her locks fold over like that. Her hair shrank by 1/2 in a matter of days. It went from bing 1/2 way down her back to above her shoulders. I can't remember who it was. But I know she had a timeline.
It's not very common too have it happen to ever lock. But it does happen
they might lock?
Locks are made by tangled hairs. Some of those loose fuzzy hairs just happen to catch onto another part of your lock further down, probably while you sleep, and don't let go easily. You could rip them apart and free it so they don't fold over. But that's a good sign of locking. It means your hair is tangling.