meow-next-thing selects only the last inner sexp inside nested sexps

[kg04ls]

meow-next-thing selects only the last inner sexp inside nested sexps.

my code:

(meow-thing-register 'sexp 'sexp 'sexp)

(defun meow-next-sexp (n)
  (interactive "p")
  (meow-next-thing 'sexp 'sexp n))

If my mark is before a (defun sexp in the code above, and I run meow-next-sexp, the point moves to the end of the sexp, but only this part is selected: (meow-next-thing 'sexp 'sexp n "w"))

[kg04ls]

and this:

(defun meow-prev-sexp (n)
    (interactive "p")
    (meow-next-thing 'sexp 'sexp (- n)))

works fine. it selects whole sexp