Here is another ever so subtle bug, I am proud of finding. When you are going into the devourer lair, and slay the eggs, Hawthorne follows you and talks to you (which is very well done). At the end, he tries to hand you an egg. If your inventory is not full, there is no problem. If you inventory is full, you will not receive the item. It will say "Hawthorne was trying to give you an egg, but your inventory is full." When that happens, you don't get another chance to ask him for it. He just walks back and attacks anything close to him. It is needless to say that the farmer quest can most likely not be finished that way.
If someone else got this problem, please confirm here.