On bedrock when you try to move your head up or down the directional sensitivity of the analog stick makes it tilt your head a bit left or right while trying to look up or down. Same goes for looking left or right. When you try to look left or right your head will probably tilt up or down. On the legacy edition when you look up or down it will tilt your head straight up and down unless you put a little more force on it on the analog stick to tilt your head left or right while the analog stick is tilted up or down. Again same goes for left and right, when you look left or right you have to put a little more force on the analog stick to tilt your head up and down while the analog stick is tilted left or right. In the bedrock version when you look up or down your head will turn a bit in the X or the Z axis direction instead of only the Y axis (up and down) This has nothing to do with the sensitivity of the speed your head turns.                                                                                                                                                                                                                                                                                                

If you look straight forward then spin around left or right at 360° for 15 seconds straight your head should NOT be looking a bit or completely down at the ground or a bit or completely up towards the sky by the end of the 15 seconds. Your head should still be looking straight forward.                                                                                                                                                                                                                                                                                                   

If you tilt it left it should just go left, if you tilted right it should just go right, not a slight bit up or down, if you tilt it up it should just go up, not a slight bit left or right. if you tilted down it should just go go down. I recommend making this a option in the settings to turn sensitive direction turning off so you dont ruin the experience for PC and Mobile devices.                                                                                                                                                                                                PS: YES I FINALLY FOUND A WAY TO DESCRIBE IT! Everyone is having trouble trying to describe why controlling the game feels weird, I saved the day 🙂 I typed all of this using a controller