### Godot version

4.1.1 stable

### System information

Windows 10

### Issue description

this is the default size loaded on startup 1024 which seems fine but it actually have loaded the default [2048] and ignored the size in project settings
![image](https://github.com/godotengine/godot/assets/53877170/c8c71de7-468a-487f-8e6c-dba1ce0f8fa5)

changing it now to any size will break it 
[2048]
![image](https://github.com/godotengine/godot/assets/53877170/3082ff09-b7d7-41f7-8fbb-813074a54135)

[512]
![image](https://github.com/godotengine/godot/assets/53877170/5ea4620f-52b5-4d0e-a5f5-747e777cd59d)


### Steps to reproduce

change 2d shadow atlas size in project settings while using compatibility renderer. 

### Minimal reproduction project

_
}
		}
	}
	if (oc->line_point_count != lines.size() && oc->vertex_array != 0) {
		glDeleteVertexArrays(1, &oc->vertex_array);
		GLES3::Utilities::get_singleton()->buffer_free_data(oc->vertex_buffer);
		GLES3::Utilities::get_singleton()->buffer_free_data(oc->index_buffer);
		oc->vertex_array = 0;
		oc->vertex_buffer = 0;
		oc->index_buffer = 0;
	}
	if (lines.size()) {
		Vector<uint8_t> geometry;
		Vector<uint8_t> indices;
		int lc = lines.size();
		geometry.resize(lc * 6 * sizeof(float));
		indices.resize(lc * 3 * sizeof(uint16_t));
		{
			uint8_t *vw = geometry.ptrw();
			float *vwptr = reinterpret_cast<float *>(vw);
			uint8_t *iw = indices.ptrw();
			uint16_t *iwptr = (uint16_t *)iw;
			const Vector2 *lr = lines.ptr();
			const int POLY_HEIGHT = 16384;
			for (int i = 0; i < lc / 2; i++) {
				vwptr[i * 12 + 0] = lr[i * 2 + 0].x;
				vwptr[i * 12 + 1] = lr[i * 2 + 0].y;
				vwptr[i * 12 + 2] = POLY_HEIGHT;
				vwptr[i * 12 + 3] = lr[i * 2 + 1].x;
				vwptr[i * 12 + 4] = lr[i * 2 + 1].y;