Its more kind of a glitch but i didnt really know how to report a glitch lol.

You can get a "Infinite Water Bucket" if you place an buckt of axolotl (doesnt matter which kind of axolotl) inside a hole, right click on the axolotl so the water is still inside the hole and you have the axolotl in your bucket again. If you now place the buckt again you duplicated water.
btw it doesnt really work without a hole, you need to do it in a 1 by 1 hole