I thought the boat would rest on the ice, not sink through.

What actually happened was that I placed the boat on the ice, then walked up to it and it dipped like in water. I hopped in, and it sunk into the water underneath, my head in the ice. I could still move me and my boat, but when I got out, it stayed underwater. The 3rd person and front view also zoom really close to steve, only first person is usable.

Steps to Reproduce:
1. Put a boat down on ice.
2. Move the boat slightly by walking into it. It should bob like on water.
3. Hop in, it should sink under the ice.
4. Do again if it doesn't work first time.