Auto-jump is not functioning properly in the beta edition and would cause the player to jump while walking/running beside a 2 block high wall or even when travelling sideways to a block.
Linked issues
Comments 4

Autojump does not result in jump, in multiple 'worlds' or 'maps' or 'packs'...
Still present in 1.14.0.1

Still present in 1.14.0.1
Autojump does not result in jump, in multiple 'worlds' or 'maps' or 'packs'...