When you have Center snap set in the snapping panel and you draw a line to a rectangle object it won't snap to the center of the object. It works for curves, Circles and Polygons but not for the rectangle tool.
- Draw a rectangle
- Make sure center snap is activated in the snap panel
- Draw a line to the center of the rectangle it won't snap to the center.
Just tested it in V4.51 and it works. It's broke in version 5.2
VIDEO LINK BELOW