Flipped green pointers on maps inside item frames

Flipped green pointers on maps inside item frames.

What I expected to happen was...:
The green pointer to point the direction the player was at the moment of hanging the map in the frame.

What actually happened was...:
The green pointer points the other way around.

Steps to Reproduce:
1. Go in creative mode, pick up an item frame and a map, hang the frame somewhere
2. Select your map, right click so it starts drawing
3. Before hang the map in the item frame, check your direction
4. After having hung the map in the frame, check the green pointer direction