[BUG] Header-args :results output of code block don't take precedence above headline header-args [9.6 (release_9.6-32-gc59d6d @ /tmp/org/org-mode/lisp/)]

[Rens Oliemans <hallo@rensoliemans.nl>]

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Hi all,

A code block with ":results output" as header argument still has its
output silenced if it's inside a headline with ":results none". MWE:

1. Create an .org file with the following content:

* Sub-tree with =:results none=
:PROPERTIES:
:header-args: :results none
:END:

#+BEGIN_SRC bash :results output
  echo "is silent"
#+END_SRC

2. Use a minimal config, attached is the one I used. Bug is present on
at least Org 9.6 and 9.5

3. Evaluate the code block(s) and see that their output is silenced.

Attached is a file much like this, but with an additional code block
with a #+HEADER style argument. Also included is the minimal-org.el I
used to reproduce this.

I tried bisecting this, but I can't find a good commit that's recent
enough to compile on my machine without changing Emacs versions. This
might be a clue that this is not a bug but a configuration issue on my
side, but I did my best to rule that out. This is the first time posting
in a (and by extension, this) mailing list, please highlight any errors
I made/things I can do better.

All the best,
Rens Oliemans

Emacs : GNU Emacs 28.1 (build 1, x86_64-redhat-linux-gnu, GTK+ Version
 3.24.34, cairo version 1.17.6) of 2022-07-21
Package: Org mode version 9.6 (release_9.6-32-gc59d6d @
 /tmp/org/org-mode/lisp/)


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* Sub-tree with =:results none=
:PROPERTIES:
:header-args: :results none
:END:

#+BEGIN_SRC bash :results output
  echo "is silent"
#+END_SRC

#+HEADER: :results output
#+BEGIN_SRC bash
  echo "is also silent"
#+END_SRC

[-- Attachment #3: minimal-org.el --]
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;; Add latest Org mode to load path.
(add-to-list 'load-path (expand-file-name "/tmp/org/org-mode/lisp"))

;; Relevant settings for bug repro
(org-babel-do-load-languages
 'org-babel-load-languages
 '((shell . t)))