Missing conceal for code block in nested list

[anntzer]

In

- this
  `is`
  - a `nested`
    `list` <- oops no conceal

the last backquoted block does not get concealed:

This is with

VIM - Vi IMproved 8.0 (2016 Sep 12, compiled Jan 24 2017 17:27:32)
Included patches: 1-237
Compiled by Arch Linux
Huge version with GTK2 GUI.

and the upstream markdown.vim, with the header

" Vim syntax file
" Language:     Markdown
" Maintainer:   Tim Pope <[email protected]>
" Filenames:    *.markdown
" Last Change:  2016 Aug 29