Apparently, there can be a mismatch of encoding after a db update by your webhost, and it can result in odd characters appearing in text. This might fix it.
Comment out a couple of standard lines on wp-config.php like so:
//define('DB_CHARSET', 'utf8');
//define('DB_COLLATE', '');
NOTE: the solution above creates more problems than it fixes (if it fixes). Often this character was introduced by copying text from Photoshop or a PDF. The best thing to do is delete the text and retype.
Possible fix (functions.php):
//remove 0003 character
function removeWeirdCharacters($content) {
$content = preg_replace('/\u0003/', '', $content);
return $content;
} Reference Links
https://www.tipsandtricks-hq.com/how-to-fix-the-character-encoding-problem-in-wordpress-1480
