What is the issue with the HTML Standard?

Let compliantHTML be the result of invoking the Get Trusted Type compliant string algorithm with TrustedHTML, this's relevant global object, html, "Document parseHTMLUnsafe", and "script".

Step number 1 of Document.parseHTMLUnsafe() reference this but the method is markes static in the IDL.
Ref: https://html.spec.whatwg.org/multipage/dom.html#the-document-object

This was discovered during the implementation of TrustedTypes in the ladybird project
LadybirdBrowser/ladybird#6057