Water is not flowing correctly on the ground or on tiles. It is too viscous and it actually piles up. We can't even make a water lock anymore because the water won't flow into adjacent tiles. Attached are images if a water lock that contains 1 kiloton of water in each of three tiles, yet it won't flow into the fourth tile. I don't know if this is just a problem with water or if all liquids are doing it, but liquids don't behave like this.
Steps to Reproduce
This is a problem with water everywhere. There aren't really any steps you have to take to make it behave incorrectly.
This issue has not been confirmed by a developer yet.