I think it's a conflict of id, when I break this plant, drop a bronze ingot, and it also has another drop tin ingot, however not thought to take another print. * sorry for my bad English. * prints:
It is, it's an item ID conflict between forestry and toomanyplants. Sk is aware of the conflict, but it is a low priority to be fixed.
Ah, so that's why my friend Bidizay brought me tin ingot amazed by the fact that we could find some breaking plants!