no, it works on boulders and also petrified trees.. i really think its a bug, it doesnt make sense to me.. its just depriving me of my resources.. plus there are other events that cause loot polution by "breaking" trees, such as the meteor showers.. also looking back at the video I think I can see the image of the log during the animation but it just doesnt drop.. (Idk, I might be imagening this though..)