First-person boat glitch

I have encountered this bug on both on my Galaxy J7 and iPad Air 2. When using the paddles on the boat, your hand disappears instead of the item you are holding. And when you ride the boat with empty slot, your hand dissepears (or appears) instead of smoothly going down (or up) as expected. When you are holding something it smoothly disappears but when it appears again it shows your hand before switching to the item.