Question UVs messed up after changing vertex positions

It's my first post on unity's forum so feel free to tell me if I'm doing something wrong

I have the following problem:
After changing the positions of sprite's vertices, the scrolling noise texture (the .gif with red noise texture) is incorrectly mapped to the sprite's surface (you can see the boundary between 2 triangles). The surprising thing is that the material preview (the .gif with greyscale noise texture) is showing the texture scrolling correctly. I want the final output to look the way the preview looks.



I guess the problem lies in the fact that the scrolling noise texture is using UVs not affected by vertex transformation.

I'm also attaching the corresponding shader graph.