Well, as shown on the picture, I cant jump trough that red formation. If I use web version, I can easily go trough the hole, but in World of Minecraft I either need to jump sideways, or place another block in front of it so I first jump onto block, and only then can go trough the hole. When just trying to jump into the hole, it's like something is blocking it.

If it's hard to understand, try building the figure in the pic yourself and to go trough it.