### Godot version

9f9210e60cddb2fa82ce5f7d71fcba340f2edbd1

### System information

Windows 11

### Issue description

I found that one of particles shaders in my project begin working incorrectly after the recent fixes. I've bisected it to 9f9210e60cddb2fa82ce5f7d71fcba340f2edbd1.

Before:
![image](https://github.com/godotengine/godot/assets/3036176/556bb0ed-6214-42ce-b194-8b54b0349b18)


After:
![image](https://github.com/godotengine/godot/assets/3036176/b3fa0b8a-20a6-4c5a-aea7-3e1ec465ea3e)


### Steps to reproduce

Download the provided test project and compare changes with different version.

### Minimal reproduction project

[bug.zip](https://github.com/godotengine/godot/files/12476303/bug.zip)

Vector<uint8_t> data;
		data.resize(width * 4);
		{
			uint8_t *wd8 = data.ptrw();
			Gradient &g = **gradient;
			for (int i = 0; i < width; i++) {
				float ofs = float(i) / (width - 1);
				Color color = g.get_color_at_offset(ofs);
				wd8[i * 4 + 0] = uint8_t(CLAMP(color.r * 255.0, 0, 255));
				wd8[i * 4 + 1] = uint8_t(CLAMP(color.g * 255.0, 0, 255));
				wd8[i * 4 + 2] = uint8_t(CLAMP(color.b * 255.0, 0, 255));
				wd8[i * 4 + 3] = uint8_t(CLAMP(color.a * 255.0, 0, 255));
			}
		}
		Ref<Image> image = memnew(Image(width, 1, false, Image::FORMAT_RGBA8, data));
		if (texture.is_valid()) {
			RID new_texture = RS::get_singleton()->texture_2d_create(image);
			RS::get_singleton()->texture_replace(texture, new_texture);
		} else {
			texture = RS::get_singleton()->texture_2d_create(image);
		}
	}
}
void GradientTexture1D::set_width(int p_width) {
	ERR_FAIL_COND_MSG(p_width <= 0 || p_width > 16384, "Texture dimensions have to be within 1 to 16384 range.");
	width = p_width;
	_queue_update();
	emit_changed();
}
int GradientTexture1D::get_width() const {