I can't find this anywhere else but it was mentioned in chat that someone thought a pig ate their harvest so I've been keeping an eye out for piggies saying "yum" when I'm harvesting to see if they were doing it to me as well.
I have the skill to harvest from trees twice but I have noticed sometimes I only get one harvest.
Just now I saw a pig say "yum" after I pressed harvest for the first time and noted I got the first harvest in full but the second harvest option did not appear.
Anyone else have more info on this?