Question Polar Coordinates displays a seam even if im using a seamless texture

I'm pretty sure this has been asked and answered some times but I hadn't been able to find a post.

I want to apply a polar coordinate modifier to a texture that will be displayed in a hemisphere but when it displays on the viewport a random seam appears in the middle.
The texture has no seams and in the Shader Graph the SampleTexture2D doesnt display any seams, only in the viewport/game.

I've checked the UVs, the normals, the texture, even if I apply the material to a Quad the seam still appears.

Any suggestion?
Thank you!

 

This issue happens when UVs flow interrupted by polar coords node so they're connecting in this seam place with a sharp transition between UV values, it somehow produces super high values so lowest MIP maps used but they're blurry and thus pixels has averaged color and stand off. With mad skills it can be fixed with DDX/DDY derivatives magic (note that using DDX/DDY nodes makes your shader graph incompatible with HDRP's DXR ray tracing/path tracing, project wont compile). But if this is only one object with this shader it's probably better to simply disable "Generate mipmaps" option in properties of all textures used with this shader (if noisy look at distance is acceptable) so no matter how high UVs go there will be nothing else to fit there except same high res texture...

Or maybe someone knows how to make smooth (in terms of end results on texture) transitions between UVs vector2 values, actual for myself...

 

Lifesaver!