The bug
The minecraft.custom:minecraft.fall_one_cm
objective is not updated when the player is in creative mode.
To reproduce
Be in creative mode.
Run
/scoreboard objectives add fall minecraft.custom:minecraft.fall_one_cm
and
/scoreboard objectives setdisplay sidebar fall
Fall from a high place and hit a block when landing.
Observed result
The scoreboard objective is not updated.
Intended.