Invisible cow

Hello,

I currently have three cows in my household inventory. After moving houses, I wasn’t able to place the first cow, so I bought a new one. That one also couldn’t be placed and ended up in the household inventory. The third cow appeared when I added a debug cow by right-clicking on the animal shed. I can assign each cow to the shed. The shed then shows as occupied (after that, I still have the option to assign animals, but when I click it, all three animals are greyed out). I hear a mooing sound and can also call the cow over. But when I call the cow, nothing actually appears! I can also trade the cow for animal treats, but the number of cows doesn’t decrease. I can trade it multiple times and make a lot of money that way. I know that this Bug Gas already been reported, but I couldn't do anything to fix it. 
Also: after the move, I bought a llama, and everything is working perfectly with that one.