Parity issue: projectiles spawned from ominous item spawner do not falling instantly

The bug

In Bedrock Edition, the projectiles spawned from ominous item spawner will falling instantly, In Java, it will floating a moment, give players plenty of time to dodging them.

Step to reproduce

1. Go to the Bedrock Edition
2. Placing some trial spawners on ground
3. Putting any spawn egg on the trial spawners
4. Drinking an ominous bottle
5. Switching the gamemode to survival
6. When the spawner are triggered, then switch back to creative mode.
7. Observing the projectiles spawning.

←The projectiles are falling instantly.

1. Go to the Java Edition
2. Placing some trial spawners on ground
3. Putting any spawn egg on the trial spawners
4. Drinking a ominous bottle
5. Give yourself a resistance 5 effect to make sure you won't dead
6. Switch yourself gamemode to survival
7. Observing the projectiles spawning.

←The projectile have a delay when falling.

Expected behavior

The projectiles falling instantly like Bedrock Edition

Observed behavior

The projectile have a delay when falling.