ZeroGravitas had mentioned reproducing this here: https://forum.terratechgame.com/ind...tech-easily-with-undo-trick.13284/#post-85620 I have two incidents from the same campaign. I could maybe reproduce this if I saved all the time and got a save before it happened but these dead blocks don't show up super often and saving that much would be annoying. I'll at least save more frequently and hopefully catch this. The first save (Dead block.sav) is a block from a tech. The second (Dead block 2.sav) is a block from a mission reward crate.