I have no idea what is happening, but firstly, I had many sheep inside a pen, and slowly they started to disappear and i confirmed my suspicion when i named a sheep jeb_ and after a minecraft day it disappeared. Also, my minecart hoppers keep disappearing as they are running in a loop, 3 have disappeared already and i have no idea how to fix it. i was wondering why i wasnt getting more wool and i realised the minecart hopper disappeared