Boat falls through the floor on certain turns

Hello, I would like to report that certain times when you turn on a boat, it will start occasionally moving your character downwards, and when exiting the boat, it falls through the floor. I also got it, in one case, to break, like how it does in the old versions. I don't know if this is a bug, or intentional, but reporting it just in case.

 

https://www.youtube.com/watch?v=rNo6yaDakFE