Speedy Skeletons On Non-Full Blocks

On blocks such as Farmland, Grass Paths, Slabs etc, skeletons/strays get super speedy and often spin around their target. Here's a not-very-good demonstration of the speedy skeletons bug: https://youtu.be/gjj7YfiIPSQ

How to Reproduce:
1. Make a Skeleton or Stray walk on a non-full block
2. Speediness
3. ???
4. Profit?