The bug
When falling on top of a block that is on y=317 or above, the fall one cm statistic is not updated
Steps to Reproduce:
Place a block at y=319
Fly to y=325.
Run
/scoreboard objectives add fall minecraft.custom:minecraft.fall_one_cm
and
/scoreboard objectives setdisplay sidebar fall
Switch gamemode to survival
→ ❌ The scoreboard does not update even though the player fell
Can confirm.