Code Macro language option only works with the language set to "none"

When we use a code macro with a language other than none, the macro does not work.
So only when using exactly this syntax, the macro works:

{{code language="none"}}
asdfasdf
{{/code}}

If none is replaced by java, sql or omitted, there is an error:
Failed to execute macro: code

We are running Xwiki Enterprise 2.1.25683 now, but I think we had this from 1.9.3.

This happens within a Blog post and also within a Content page.