The bug

If a snowball, fishing bobber, splash potion, trident, or arrow lands on a wool block, nearby sculk sensors will be triggered, even though walking or jumping on wool blocks does not trigger sculk sensors. It is unclear whether or not this is intended.

How to reproduce

1. Stand outside of the sculk sensor's range so that it will not detect you firing the projectile
2. Fire the projectile at a wool block that is inside of the sculk sensor's range
3. Notice that the sculk sensor was triggered, even though the projectile landed on a wool block