I owned the town farm plot in Pumpkin valley and placed my corps next to my barn. The first ones I harvested came as normally in my inventory but my second harvest disapeared when I tried to harvest it, I had the sound of harvesting but nothing in my inventory. It wasn't a specific kind of corp (I had a mixed field with some spring plants), I also think I didn't do something unusual. But I had also a little bug that my watering can, it was stuck at the well I couldn't water my fields (only if I clicked a second time at the well).
I often have a completely black screen after sleeping on my multiplayer server. I can still see my mouse cursor and hear the game, but I'm left to exit to the main menu and reconnect. The other player doesn't have the problem when it occurs to me.