Yes, this is the same problem than the one reported by Muchenxuan Tong; a different problem than the one reported by Jeff, fixed.
(I will take a lot at the problem later on this week.) I first wasn't able to reproduce those problems because I have `org-special-ctrl-a/e' set to 'reversed, so C-e does not go after the folded region -- maybe this should be the default behavior, it would avoid a lot of these problems. -- Bastien