Unable to hold a note

[MarcusConnors]

With Genshin Impact releasing the new Nightwind Horn, we now have the ability to hold a key to play a long note.

I have noticed within the source code that there is untested scripting for such a feature, however I am unsure if it is disabled, or simply not working.

In case of the latter, I am making this issue post to see if it could potentially be resolved.