The sun is disappearing.

What I expected was that, after using a renamed Command Block to set the time, the sun would be where it is in the sky or the moon/stars would be in the sky.

What actually happened was, after making a slightly laggy redstone contraption and using the renamed Command Block to set the time, the sun/moon and stars disappeared. Exiting the world and re-entering would work for a moment, but the sun/moon and stars would make a smooth transition to disappearing.

Steps to reproduce:
1. Enter a world.
2. Use a command block (unnamed hasn't been tested) to set the time.
3. Look at where the sun would be.
4. Exit and re-enter the world.
5. Look at the sun again.

(Picture shows time set to 5800 while looking at beacon beam, which points to where the sun would be.)