最后尝试一遍

web/template/syzoj/problem.php

@@ -477,7 +477,7 @@ if ($pr_flag) {
             $(this).html(marked.parse($(this).html()));
           <?php } else if ($OJ_MARKDOWN && $OJ_MARKDOWN == "markdown-it") { ?>
               const md = window.markdownit();
-              $(this).html(md.render($(this).text()));
+              $(this).html(md.render($(this).html()));
           <?php } ?>
         });
         // adding note for ```input1  ```output1 in description