dunno if someone found it before me, but when creating a loop with X times within a loop for X times, the outer loop will run indefinitely.
you might wanna try that. had a robot set up to make other robots, but only four at a time. ended up with an army of robots :D
i scrolled up a bit. someone else already reportet it.
i also had a hard time starting new because the tree seeds disappeared before i had time to make a workerbot to assign him to collect them. had to chop down an additional forest for new tree seeds to kickstart my tree farm :D