Grass Blocks Held by Endermen have no Texture

When an enderman picks up a grass block, the block in it's hands is rendered as if it has no texture (purple and black checkerboard). Other blocks, such as gravel, are still displayed correctly. I have not tested all blocks, just grass and gravel.

To reproduce:
Spawn an enderman on a grass-covered surface. When it picks up a grass block, the texture will not render properly.