The URP Water Shader does not work properly in Game view when using Perspective Camera. It does however work in Scene view or when using Orthographic Camera.
Unity 2019.4.19f1 and the latest version of Flat Kit.
No errors in the console
The demo scenes do work correctly. To reproduce the issue I create a new scene, create a new material with the water shader on it and assign it to a plane in the scene.
The URP Water Shader does not work properly in Game view when using Perspective Camera. It does however work in Scene view or when using Orthographic Camera.
This is in Game view:
And this in Scene view: