Duplicate Copy from code block results in span tags

[stromb0li]

Affected version

2.3

This is reproducible on the Xenforo website.

Here's a code block:

<?php
    echo 'this is going to get weird';

If you highlight text in the block, copy, and then paste into the reply box, you'll get span tags.

Edit: Looks like this is a duplicate: https://xenforo.com/community/threads/copying-from-a-code-block-copies-html.221184/