Error in plotting with sf_centroid

I am glad you sorted this out, but the issue still bugs me. Real life™ prevented me from looking into this in a finer detail, but it still feels wrong.

The workshop I was refering to was, but we did not touch it in the main line; I was just goofing off with a participant who had some time left, having finished her exercises early.

Thanks for your reference.
So I agree with you it's seem that there is an issue with sf package. It will be interesting to do an issue in sf package on github.