mobs such as pigs in minecarts. once the cart has been broke it will glitch into the floor

Put the summary of the bug you're having here pigs cows etc.. glitch in floor when in minecart and minecart is broken

What I expected to happen was...:
Describe what you thought should happen here what i expected was the "pig" to go back on surface

What actually happened was...:
Describe what happened here pig glitched 1 block into floor

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ... 1. animal/mob gets in minecart 2. you break minecart
3. ... 3. mob stays gliched in 1 block down even after block/blocks is broken