Has anyone noticed this?

Stop the water pouring from the left or from the right on the North Waterwheel. Take one step away (one click). Then turn around and come back.

There will be water pouring from both sides again, just for a moment. And you can watch whichever side you blocked stop flowing again.

But if you walk away, it "looks as if" it starts up again.

Not only that. But similar to the "tinkerbell" graphic glitch, if you save the game while looking at the water with only one side flowing, when you Quit and come back, there it is: flowing from both sides for just a moment.