The bug
When the mob or player is riding the entity and sliding down the honey block, does not produce a sliding sound, subtitles and particles.
Related issues
relates to
testing discovered
Attachments
Comments

[media][media][media][media][media]
Seems to relate to MC-163411.

Confirmed for 1.16 Pre-2
Can confirm in 21w05b.
Can confirm in 21w07a.
Video attached.
Can confirm in 1.17.
Can confirm in 1.18.1.
Can confirm in 1.18.2.