While exploring a Soul Sand Valley biome, I was unable to traverse any patches of soul sand (being forced to stick to the soul soil areas) due to an invisible barrier that stopped me being able to move across or jump up to the soul sand blocks. From my testing, this also occurs with farmland and grass path blocks.

What I expected to happen was...:
To be able to travel across the Soul Sand Valley with relative ease

What actually happened was...:
I was prevented from doing so due to what I assume is a collision error, stopping me from being able to move onto soul sand blocks. 

Steps to Reproduce:
1. Create a new world in 1.16 Pre-release 5
2. On (but not in) the ground, place two blocks of soul sand next to two of any full block.
3. You should be able to walk onto the soul sand, but you will be prevented from walking off the edge, onto the floor, as if you were sneaking.