Advancements Nbt Bug

{
"display": {
"icon":

{ "item": "minecraft:bone" }

,
"title": "Orc Slayer",
"description": "Slay An Orc"
},
"parent": "DLAPAD:magic_age/book",
"rewards":

{ "function": "DLAP_functions:reward/orc" }

,
"criteria": {
"orcmals": {
"trigger": "minecraft:player_killed_entity",
"conditions": {
"entity": {
"type": "zombie",
"nbt": "

{CustomName:\"Orc\",CustomNameVisible:1}

"

}
}
}
}
}
This is my custom advancement It apears in the tab but it does not work
If kill a zombie with the name Orc I will not ge the advancement...