The bug
Since the fix of MC-13626, one would expect the level up sound not to play in creative mode.
To reproduce
Set a repeating command block with the following command:
/summon experience_orb ~ ~2 ~ {Value:10}
Stand by it whilst on creative mode.
Expected result
The level up sound ("Player dings") would not play.
Observed result
The level up sound ("Player dings") plays.
Linked issues
testing discovered
Comments

i can confirm it in 1.17.1 too