As soon as the 19w05a snapshot came out, I got into one of my worlds and every lead rope that was tying up an animal was going crazy! The lead rope wouldn't appear on the fence it was attached to, and if you turned the direction of it, you could see a rope frantically glitching all over the screen. 

I follow the glitching rope, because it was going off into the horizon but I found no end to it. I hope this is just a slight bug, because I cannot tie up any animal without this happening!