The fixing of MC-251878 allows for player-dropped items to alert shriekers. Sneaking can also prevent the item from creating vibrations.

Here's my issue with the sneaking mechanics for player-dropped items:

Expected behavior:

An item you drop that hits the ground will not create a vibration if you were sneaking the moment you threw the item.

Observed behavior:

An item you drop doesn't create a vibration if you were sneaking at the moment the item hit the ground.

Below are a few examples of this bug being showcased.

You can throw an item without sneaking, but if you sneak by the time the item hits the ground, a vibration won't be produced.

2022-05-25 09-12-21.mp4

You can throw an item while sneaking, but if you let go of your sneak button by the time the item hits the ground a vibration will be produced.

2022-05-25 09-17-26.mp4

^{My personal fix suggestion would be to make items hitting the floor a vibration that cannot be avoided by sneaking.}