Put the summary of the bug you're having here

What I expected to happen was...:
Hands should be behind the held map while in a boat, always.

What actually happened was...:
The hands cover the left and right corners of the map while travelling via boat.

Steps to Reproduce:
1. Craft boat and map on a craft table,
2. Find water,
3. Place boat in water.
4. Mount boat.
5. Hold map.
6. Cycle camera view (F5) to 1st person view.

P.S. This ONLY happens when you have cycled camera view WHILE holding a map WHILE in a boat. If you cycle camera view while holding map and while NOT in a boat, the hands are behind the map again. Small bug.