If you go above 250 Y cords, the biome name will go away
MC-30102
When you press F3 and the cords show up, if you go above 250 Y the biome will disappear
Resolved
Works As Intended
0
That is because you are leaving the maximum render distance.
http://www.minecraftwiki.net/wiki/Frame_rate#Render_distance
Far Draw Distance: 16 chunks, 256 blocks