Custom input on "CONTROL"

[MostlyNumbers]

Setting a custom input on only the Ctrl key does not seem to trigger. i.e.:

Code: Select all

{
	type = "custom-input",
	name = "mn-custom-input",
	key_sequence = "CONTROL",
	consuming = "none"
}/code]

Is this a bug or a known "feature"?
Switching it with "CONTROL + ALT" for instance does trigger, it seems just the ctrl key alone behaves differently.