It could be that arbitrary (or non-arbitrary) sets of 1, 2, 3, 4…? of adjacent hexagonal cells are getting merged but gives the illusion of rotating because this adjacency happens at different angles? The circles in the center(s) do have some kind of visual texture effect that looks like rotating 
Agree.
I feel like I’ve seen a grasshopper example of this already somewhere. I don’t remember how to search for it now.
And it reminds me of this lengthy/gracious discussion:
Which will link you to this one.