Only the first line is highlighted for multi-line comments and there are some other syntax highlighting glitches due to incorrect HTML generation.

A simple example to demonstrate the problem:

/*
 * Multi-line comment!
 */

<span class="comment">/*
 * Multi-line comment!
 */</span>

<tr><td>1</td><td><span class="comment">/*</td></tr>
<tr><td>2</td><td> * Multi-line comment!</td></tr>
<tr><td>3</td><td> */</span></td></tr>

The <span> tags are left unclosed inside <td> tags, this leads to a syntax highlighting issues.

A more complex example to demonstrate the problem: https://paste.in.ua/eyk9/

HTML Validation Report: https://validator.w3.org/nu/?doc=https%3A%2F%2Fpaste.in.ua%2Feyk9%2F

I tried to solve this problem on my similar code snippets sharing service: https://code.exlmoto.ru/161

HTML Validation Report: https://validator.w3.org/nu/?doc=https%3A%2F%2Fcode.exlmoto.ru%2F161

My solution to this problem is described here: https://habr.com/ru/post/534044/#service

And in the source code of my project:
https://github.com/EXL/CodePolyglot/blob/master/src/main/java/ru/exlmoto/code/highlight/filter/TagCompensator.java

I hope you find this information useful.
Merry Christmas and Happy New Year!

when visit https://paste.in.ua/about/, the follow message is shown

No matching field found: reset for class java.io.StringReader