Minecolonies version

Version: 0.11.893

Expected behavior

I expected the builder to ignore the new Cave Air block just like regular air and continue breaking blocks.

Actual behaviour

If the miner encounters Cave Air in a place where he is meant to build something he will at the start in the block breaking phase break the cave air, which doesn't make that much sense.

Steps to reproduce the problem

1. Go into a cave
2. create a build job
3. hope that this cave is actually filled with cave air, and not regular air
4. see the builder breaking air

Logs: Latest.log and crashlog at https://gist.github.com/

• latest.log:
• crashlog: