The width of an advancement's description depends on the first line

The bug

The width of the description of an advancement depends on the width of the first line, rather than the width of longest line in the description, or the width of the title of the advancement.

Example advancement

{
	"criteria": {
		"lock": {
			"trigger": "minecraft:impossible"
		},
		"breed_two_cows": {
			"conditions": {
				"parent": {
					"type": "minecraft:cow"
				},
				"partner": {
					"type": "minecraft:cow"
				}
			},
			"trigger": "minecraft:bred_animals"
		}
	},
	"display": {
		"announce_to_chat": false,
		"description": "> lock\n> breed_two_cows",
		"frame": "challenge",
		"hidden": false,
		"icon": {
			"item": "minecraft:cow_spawn_egg"
		},
		"show_toast": false,
		"title": "breed_two_cows"
	}
}