for the (/tp biome) is the woodland mansion biome missing

when typing /tp @s biome the woodland mansion biome can't be found 

expected result:

the woodland mansion biome can be found when typing /tp @s biome 

actual result:

that biome can't be found when typing /tp @s biome

how to reproduce 

1. use the comandconsole and type in /tp @s biome
2. then try typing woodland mansion biome 

this bug can effect millions of players who use creative

NOTE: 
sorry but i can't remember how that biome was called