Autoloader endlessly loads extensions blocking the whole page

[RunDevelopment]

Information:

• Prism version: 1.16
• Environment: Browser & everything that Autoloader

Description
When using Autoloader on an element which has an extension set as its language, the Autoloader will endlessly try to load this language and block the whole page in the process.

I know that using an extension as a language is a mistake itself but it is something which shouldn't cause the Autoloader to just crash the page.

Example

<code class="language-js-extra"></code>