I dont know if this is a good new or not, but i think i see a glitch in when playing v58
When i delete the mining building when the droid is out of it, the droid still be there and do it job nomally
So i tried remake it like 4 times and got a mining building with 5 (real) droid at the same time, make my building full of ore
Beside, the game frozen when im playing for like 2 hours. I dont know what cause it, and i dont know if you should care or not