It was using the Unlint/Transparent shader on a texture with an alpha channel in the Builtin Render Pipeline. However, I realized that I could not set the base color with this shader, so I changed it to Legacy Shaders/Transparent/Diffuse.
The program has been changed because it did not adequately handle irregular sculpt image sizes. However, since this is a symptomatic change, there may be other some images size that need to be corrected.
It was found that when duplicate vertices were removed, the texture was shifted even for no Sculpted Prims.
Deleting duplicate vertices was completely stopped.
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