Arrow/Item in offhand still displayed while drawing bow in first person view

When having any arrow in your offhand and a bow in your main hand and try to shoot with it, the arrow on the offhand does still render whilst charging the bow (in the Minecon Stream, the Arrows in the Offhand did not render anymore whilst charging a bow and i think it is indeed a feature that is bugged)

Video: https://www.youtube.com/watch?feature=player_detailpage&v=h3vjmzCV8PY#t=1355

To recreate:
1. Put any arrow in the offhand
2. Get a bow in your mainhand
3. Charge it and you will see that the arrow still renders in Ego and in F5 Mode (looks really weird)