Steps to reproduce:
1. Select a mex in the constuction menu
2. Hover over a max spot
3. Press B to activate pre-terraform, press V/C to modify height
4. Build mex
Expected result: Terra command queued, then mex built.
Result: The mex is built, the terraform is never queued.
Broke at lastest update, I think?
The pre-terraform feature woks fine for everything else, though.