LogError message gets formatted into html

String msg = "<h2>Options:</h2><div><ul><li>item1</li><li>item2</li></ul></div>";
when calling session.logError(msg);, the above message gets formatted in the workbench log tab.
It used to display the log as a regular string:
<h2>Options:</h2><div><ul><li>item1</li><li>item2</li></ul></div>

But now it displays it like this:

Options:

This is only for session.logError, the other log levels display correctly. This started happening on version 6.0.24a. Is this a bug?