In Ubuntu 18.04 Unity, dragging windows turns them a solid gray color

In 18.04, I installed ubuntu-unity-desktop package, and restarted and logged in with Unity, and whenever I drag a window it goes an ugly gray color (and doesn't wobbble, with wobbly windows turned on). Strangely, maximizing and minimizing does make them wobbly.

I'm on the latest (PPA) nVidia drivers and Compiz Config Manager has animations and everything turned on. It worked fine in Ubuntu 16 with the same setup.

Notably Unity transparency/blur also doesn't work.

Here is what happens when I drag: