Renaming a slime or Magma cube, Once it splits it no longer has its custom name.

Put the summary of the bug you're having here

What I expected to happen was...:
It should have said "Was killed by (insert custom name here)"

What actually happened was...:
It said "Was killed by Slime"

Steps to Reproduce:
1. Rename a Slime OR magma cube egg
2. Place said egg
3. If it is Large/medium size split it into a smaller size
4. Let the smaller size kill you
5. It will say "was killed by slime" NOT the custom name you gave it!