Mubble Version: 1.4-pre9 or the newest build

Describe the bug
All or most blocks that should burn e.g. Wooden Stairs are not burnable or not disappear after that.

To Reproduce
Steps to reproduce the behavior:

1. Place a Wooden Stair or other things that should burn from Mubble.
2. Lit it up with flint and steel.
3. See the result.

Expected behavior
The 'burnable blocks' should burn and disappear.

Thanks for the report!

This bug has been fixed in v1.4.