[BUG] babel R src block with :results output hangs [9.5.2 (9.5.2 @ /usr/share/emacs/site-lisp/elpa/org-9.5.2/)]

[JM Nunes]

Source blocks with header arg ':results output' either locally or via
#+PROPERTY: do never return (waited 10 minutes before C-g).
Editing the block in a major mode buffer (C-c') shows the correct
results in the iess R session.

The block:

#+BEGIN_SRC R :results output
  sqrt(-4)  #+END_SRC

should show:

[1] NaN
Warning message:
In sqrt(-4) : NaNs produced


Emacs  : GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 
3.24.30, cairo version 1.16.0)
 of 2022-01-24, modified by Debian
Package: Org mode version 9.5.2 (9.5.2 @ 
/usr/share/emacs/site-lisp/elpa/org-9.5.2/)