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:
An item you drop that hits the ground will not create a vibration if you were sneaking the moment you threw the item.
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.
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.
My personal fix suggestion would be to make items hitting the floor a vibration that cannot be avoided by sneaking.