systemd-failed-units: Module is blank if using `systemd_state`

[BBaoVanC]

Using Arch Linux with waybar 0.14.0-6.

If I add {systemd_state} to the format field, then the entire module just becomes blank; I can only see 1 pixel wide of the background color and no text.

Minimal broken config:

{
	"height": 32,
	"spacing": 4,
	"modules-left": [
		"systemd-failed-units",
	],
	"systemd-failed-units": {
		"format": "system: {systemd_state}, user: {user_state}, overall: {overall_state}",
	},
}

Minimal working config:

{
	"height": 32,
	"spacing": 4,
	"modules-left": [
		"systemd-failed-units",
	],
	"systemd-failed-units": {
		"format": "user: {user_state}, overall: {overall_state}",
	},
}

Pictures (done with my custom style, but it does happen even with those files deleted):

Working:

Broken: