I found this by accident while analyzing the I Ching with code. 81% of hexagrams are locked in one chain, none stays in its original position. You can verify it yourself in the browser. Has anyone seen this before?
Fascinating. I've barely any knowledge of I Ching. What motivated you to explore this and I Ching in general?
People have known about this since the Shang dynasty so yes it has been noticed before.
If you find this interesting, I suggest you study group theory - this seems pretty much a direct consequence of the group structure.