The bug
If the player jumps while walking/sprinting on soul sand, the enchantment will not be applied when in the air. This is probably because there is technically no longer soul sand, but air below the players feet.
How to recreate: Equip Soul Speed boots, and jump while sprinting/walking on soul sand.
Linked issues
is duplicated by
Comments


Still present in 20w19a

Still present through 1.16 Pre-release 5

Cannot reproduce. I can clear a 5 block jump using Soul Speed 3.

CalXee did you use soul soil? This bug only affects soul sand, but not soul soil.

Still present in 1.16 Pre-release 7

Affects 1.16 Release Candidate 1

Confirmed/Reproduced in 20w28a.

Fixed in 1.16.2 Pre-1 probably due to fixing MC-174574
The slowness and the speed effect also have this issue. (always not just when walking on soul sand) When having slowness at level 7 you can still move when jumping while being not on the ground. And speed also doesn't work midair but when jumping you will keep the momentum that you had when being on the ground.