Left hand covers corner of held map when riding an entity and switching the perspective

When you ride anything(boat, minecarts, pigs etc.) when you press F5 and then return to the normal first person view, you will notice that your hands are on the map and change their place. This bug is also noted in the minecraftwiki's "maps" page but I didn't see any created issues here... Anyways here are some screenshots:

Since 14wXX the corner of the map gets covered even when not riding a vehicle.