Steps to Reproduce:
Enable the Update 1.21 Experiment;
Throw wind charges towards the sky;
Wait for a bit;
Use the command
/kill @e[type=wind_charge_projectile]
Observed Results:
The wind charges only get removed when the command is used.
Expected Results:
Wind charges despawn on their own.
Notes:
Comments 3
In Java Edition, wind charges detonate when their Y-coordinate is equal to or greater than 350 in the overworld and 287 in the nether and the end, regardless of whether they have collided with a block or an entity.
Confirmed, Relates to MC-268350 (Which was fixed in 24w09a)