Describe the bug
Game crashes if a ? Block is activated under semi-passable blocks such as trapdoors, fence gates, snow layers...

To Reproduce
Steps to reproduce the behavior:

1. Place a ? Block.
2. Place a snow layer, as an example, on top of it.

Expected behavior
The item inside the block should have dropped instead of making the game crash.

Thanks for the report!

This bug has been fixed in v1.2.1.