The animation is too low on the screen. The first frame where the arm starts to swing is in the same position as the second frame, but on java its a bit further to the right. (its a bit hard to see because its in 30fps) Also After the arm reaches the highest point on the screen it immediately changes the angle of the arm while on java the angle stays facing one side of the arm until the arm starts going back to the starting position. The arm goes further to the left of the screen from the cross hair then its supposed to. And some of the animation goes off screen. The animation became broken in 1.13

Steps to Reproduce:
1. Load up a world on Minecraft bedrock
2. Attack the air with nothing in your selected slot 
3. look at the incorrect animation 

Observed Results:
it plays a incorrect animation

Expected Results:
it will play the correct animation that has been always matched Java and has been there until 1.13 released on bedrock