Ok, I have been mistaken (this is already fixed in current development version).
In JComments 2.2 you could fix it so:
1. Open file /components/com_jcomments/jcomments.php
2. Replace code:
// run autocensor
if ($acl->check('enable_autocensor')) {
$comment->comment = JCommentsText::censor($comment->comment);
}
with
// run autocensor
if ($acl->check('enable_autocensor')) {
$comment->comment = JCommentsText::censor($comment->comment);
if ($comment->title != '') {
$comment->title = JCommentsText::censor($comment->title);
}
}