Jumping & landing sounds aren't considered part of the "Players" slider, they're controlled by the "Blocks" slider instead.
This is inconsistent with the stepping sounds. Since MCPE-109252 works as intended, these are the incorrect ones.
MCPE-116135
Jumping & landing sounds aren't controlled by the "Players" slider
Resolved
Fixed
6
(Unassigned)
426461
Confirmed
Multiple
1.17.0.50 Beta, 1.16.220, 1.16.210.57 Beta, 1.16.201 Hotfix, 1.16.221 Hotfix, 1.17.2 Hotfix
1.17.20.20 Beta, 1.17.30
Retrieved
Affects 1.16.210.58