What is the issue with the HTML Standard?

I noticed this inconsistency while working on modulepreload support for Servo.
Inside fetch a single module script the default value of moduleType is javascript-or-wasm, which can be overridden by performing module type from module request with the optional argument moduleRequest.

Essentially it is expected that JSON and CSS module scripts can only be fetched if they are descendants of a javascript module, which is no longer the case with #11981.