mapcss: prop() in selector doesn't work together with child selector

[Klumbumbus]

The following mapcss code is not working:

*
{
	help: tag("addr:housenumber");
}

way[prop(help)>3] > node
{
	symbol-shape: circle;
	symbol-size: 20;
}

The result should look like:
Tested with JOSM stable 7000 and latest 7080.