Fixes ParallaxLayer offset when ignore camera zoom

scene/2d/parallax_background.cpp

@@ -101,7 +101,7 @@ void ParallaxBackground::_update_scroll() {
 		}
 
 		if (ignore_camera_zoom) {
-			l->set_base_offset_and_scale(ofs, 1.0, screen_offset);
+			l->set_base_offset_and_scale((ofs + screen_offset * (scale - 1)) / scale, 1.0, screen_offset);
 		} else {
 			l->set_base_offset_and_scale(ofs, scale, screen_offset);
 		}