In the past, when I go to work on someone's farm, it might show the crops have worms, but the system message is "Crops are already healthy" or something like that. I assume that is because someone beat me to it.

I was just doing that when suddenly the whole farm blinked to ready to harvest and instead of weeding, I picked up someone's crop when I didn't want to. ARGH!

If this system was updated, please revert. I don't need surprises like that. :-(