Clouds get stuck to my screen

When I have clouds on and I can see them on the sky, If I go to the settings and turn them off while I can still see them. The clouds I can see get stuck to the top of the screen.

What I expected to happen was...:
That there is no clouds.

What actually happened was...:
The old clouds are stuck to the top of the screen.

Steps to Reproduce:
1. Have clouds on fast or fancy and look at the sky to make sure they are on the screen.
2. Turn off clouds.
3. The clouds you could see should still be there and stuck to the top of your screen.