edit: As of 0.14.2 arrows in the top or bottom of a door do not update when the door changes state. But it's unclear if the bug got worse or if this works as intended...
If an arrow is blocked by the window (upper half of a door), it will float in the air when the door is opened or closed. We expected the arrows to fall and stick in the ground when the door was opened. In contrast, arrows blocked by the lower part of a door do fall and stick in the ground when the door is opened or closed.