Ground surfaces issue

Issue description

This happens when I add a surface such as concrete surface, or metal surface. If it hasn't finished being placed and then save and quit some of the tiles disappear next time you log into the save.

Reproduction steps

Anytime I add surfaces to the ground , save and quit before they are finished. On next load of the save some tiles missing.

Game version and build number

v0.7.5c

Operating system

Windows

Yes, we tracked this bug and fixed it in one of our recent patches. It was on load that the tree serialization code cleared those tiles. Thanks for the report!