Put the summary of the bug you're having here
What I expected to happen was...
What I expected to happen was for the particle affect to appear at my feet after falling more than three blocks. I fell 10 and it didn't work.
What actually happened was...:
Nothing, the particle affect didn't appear.
Steps to Reproduce:
1. Place a Mossy Cobblestone Wall block.
2. Build (or fly) upwards over 3 blocks above.
3. Jump onto the Mossy Cobblestone Wall while looking at yor feet.
Yep, and it's not just Mossy Cobblestone wall. All walls/fences have this issue as well. It could be something to do with the larger hitbox.