the belt is too slow, the 3 miner at the bottom can't push the ores to the belt and the 3 refiner above can't take any ores.
I'm having the same issue. I also have a boss that's outside my attack range but it's a low level one and my repair outheals it so whatever.
edit: the unlock did fix it, I just got there before the unlock. the wave start cash upgrade may be too powerful
an unlock, sorta fixes this?
