Steps to reproduce the issue

Set default editor as CodeMirror then create or open any element like an article, category or module in joomla administration area where the editor can be used, click inside the editor area and press the tab key on the keyboard.

Expected result

indent using tab key in CodeMirror editor

Actual result

Pressing the Tab key takes the cursor from the editing area to the next button out of the editor.

System information (as much as possible)

Joomla! Version: Joomla! 5.0.2 Stable
PHP Version: 8.1.10
Database Type: mysql
Database Collation: utf8mb4_general_ci

Additional comments