First Person View hand animations are broken

The 1.13 betas introduced some animation/positioning issues:

1. The position of the hand changed (causing the punching/breaking animation to change as well);
2. The hand's position and bobbing animation don't match the maps' bobbing animation;
3. Your hand will be displayed in weird positions when you start gliding with an elytra (only when facing north or south);
4. Hand position is lowered a LOT in relation to previous versions, and feels really weird.

Expected results:
The hand position/animations look exactly like it did before, which was at parity with Java.

Observed results:
Although Bedrock doesn't have to be exactly like Java, this is broken.