Minecraft is broken

this bug is very bad in my Minecraft 1.9. I don't have mods, I don't hack, I'm just a normal player! Ever since I downloaded Minecraft 1.9, strange things have been happening. Parts of the world have been popping up in other parts, so there's blocks everywhere, animals have the side of a mushroom block growing out of them, and its just mayhem. As for how to recreate the bug, I dunno. It's just random! P.S: The pictures are just this bug on a good day!