[BUG] Incorrect source block indentation [9.8-pre (release_9.7.6-86-g571f1c)]

[the_wurfkreuz]

When I create a source block, pressing ENTER (RET) at the end of the

first line indents the cursor visually about 10 characters to the

right. If I press RET again to create a new line, it re-indents the

previously displaced line, but the new line is also incorrectly placed.

Steps to reproduce:

1. emacs -Q

2. Enable org-mode in a scartch buffer.

3. Write:

   #+begin_src fundamental  

   #+end_src

4. Place the cursor after the last character of the first line and press RET.

5. Write something on the newly created line, then create another new line using RET.

Emacs  : GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.41, cairo version 1.18.0)

 of 2024-04-23

Package: Org mode version 9.8-pre (release_9.7.6-86-g571f1c @ /home/wurfkreuz/.emacs.d/straight/build/org/)