[O] `C-c C-z' does not add note to LOGBOOK drawer

[Van L]

Hello,

I find the note is placed above the LOGBOOK drawer and not added to inside as 
expected.

— quote
If you want to store a quick note in the LOGBOOK
drawer, in a similar way to state changes, use

‘C-c C-z’
     Add a time-stamped note to the LOGBOOK drawer.
— quote ends

— quote
readings-hpw -*- mode: org; -*-

* ideas

* notes

* clean

* dirty
  :PROPERTIES:
  :Effort:   1:06
  :END:
  - Note taken on [2018-07-20 Fri 17:28] \\
    Homer was born long after the Trojan War.
  :LOGBOOK:
  CLOCK: [2018-07-20 Fri 17:26]
  :END:
— quote ends

(org-version)
"9.1.13"
(emacs-version)
"GNU Emacs 26.1"