Coordinates of the input are incorrect.

[valentinwinkelmann]

bandicam.2021-03-18.12-11-42-605.mp4

Does not work in Unity 2019.4.19f1 URP.
Tested with the Github version and the Assetstore version.

Here is a screenshot of the UV mapping of the curved surface.

[infobeisel]

Hey, would it be possible to share your setup as a unity export package here ?