I see the behavior ardynor describes, however 6.2 is the first and only version I've had. I waited a while longer, perhaps, than ardynor and saw that eventually the bot does move on. Breaking the cycle, e.g., by putting in a moveto coords, does not workaround the issue as the bot just retargets the same spot, which is now not plantable is cycles through the list of actions again. That is, I tried the program ardynor shows and a whole mess of others, any that find and move to tilled soil present this issue.