Forge version:
Twilight Forest version: (this is the build number)
Link to crash log: (please use a paste site such as gist, do not attach the .txt or paste the log inline)

Steps to reproduce:
1.

What I expected to happen:
Fireballs to explode upon hitting instead of entering other blocks
What happened instead:
Fireballs entered other blocks

There doesn't appear to be a version of Twilight Forest specified. Which version does this occur on, and if possible to answer, what other mods are installed?