As you can see in the video:

• There's water on the channels.
• The sprinkler won't spin.
• There's no particle effects.
• The water level drops slightly (show that they are working) after closing the valve.

This is of course a minor issue but a problem when you run out of water.

Here's the short (27s) video of the issue:
https://youtu.be/GLywfeJITP8