Guild API not displaying monk specs?

I've come across the following discrepancy in the guild api


{
"character": {
"name": "Tigglebittíe",
"realm": "Draenor",
"battlegroup": "Cyclone",
"class": 2,
"race": 1,
"gender": 1,
"level": 87,
"achievementPoints": 11755,
"thumbnail": "draenor/65/79801153-avatar.jpg",
"guild": "Maelstrom",
"spec": {
"name": "Protection",
"role": "TANK",
"backgroundImage": "bg-paladin-protection",
"icon": "ability_paladin_shieldofthetemplar",
"description": "Uses Holy magic to shield himself and defend allies from attackers.",
"order": 1
}
},
"rank": 7
},
{
"character": {
"name": "Vester",
"realm": "Draenor",
"battlegroup": "Cyclone",
"class": 10,
"race": 4,
"gender": 1,
"level": 90,
"achievementPoints": 9680,
"thumbnail": "draenor/227/79817699-avatar.jpg",
"guild": "Maelstrom"
},
"rank": 0
},

The first character, Tiggle, is a paladin and we can see her spec is listed in the feed, however Vester, a monk, does not have the spec listed.