1. Set `outline-minor-mode-use-buttons' to true (I've done it through
`customize-group')

2. Enter "C-h b" and switch to the *Help* buffer

3. Toggle visibility of the first heading body using `outline-minor-mode'
keybindings "C-c @ C-t" (`outline-hide-body').

4. Observe the broken buttons state as in attached screenshot: