Since the last snapshot, player's point of view is inverted. I logged into my survival world and everything was uspide-down. I tried to load an other world that i played in 20w21a and it was also bugged. Then i tried creating a fresh new world and the issue was the same. Here's what it looks like (screenshot below).

Perhaps it has to do with the experimental graphic changes in this version.

I thought it could be fixed by setting a FOV with a negative value, but with default settings the game is currently unplayable.

My setup : 

CPU : Intel Core i5-4440 4 cores 3.10GHz

GPU : GeForce GTX 770