wp-rss2.php broken after localization

Now, this is beginning to drive me nuts!

The comments have stopped showing up in the RSS-feed. In my blog:
https://www.eirikso.com

I follow comments with this feed:
https://www.eirikso.com/index.php?feed=rss2&withcomments=1

For some strange kind of reason, any comments posted to post number 46 and up does not show up in the RSS-feed. They are in the blog and they are in the database, but not in the RSS-feed.

All comments done on post number 45 and down show up fine!

I have the same problem with my other blogs. Comments on new posts does not show up in the feed. Comments on old posts show up.

Starting to get slightly frustrated here… Just when I thought everything worked fine!

Any suggestions?

And then: after a couple of hours… the comments magically appear! I have no idea why they stopped, but they are back.

In other words: problem solved.

I made a filter rssfix.php which solves the problem and works fine for me (don’t know if this is 100% correct, I’m not a WP-expert):

<?php

/*
Plugin Name: rssfix
Plugin URI: https://blog.wereldkeuken.be/
Description: This plugin fixes the broken RSS-feed
Author URI: https://blog.wereldkeuken.be/
Version: 0.1
*/

add_filter("comment_author_rss", "htmlentities");
add_filter("comment_text_rss", "htmlentities");

?>