Put the summary of the bug you're having here

What I expected to happen was...:
The items floated and sank a little like normal.

What actually happened was...:
I thew a pick, sword, and shovel into water. when they floated up fully, they went straight back to the bottom, almost like they tped back to the bottom. This keeps repeating and is very weird.

Steps to Reproduce:
1. throw the item into water (not sure if the pick, sword, and shovel where specifically the problem)  but if It was specific the sword had unbreaking 3, pic efficiency 1, shovel also efficiency 1.
2. watch the items float and tp to the bottom repeatedly
3. boom, done