"72.Updated /dns command, now multi-threaded, resolves concurrently, and can return both IPv4 and IPv6 addresses. By default, /dns only returns IPv4. You can use the switches -46 to return a combination of IPv4 and IPv6 addresses."
you may (guess) be reading this wrong, i think that means if both types can be displayed it defaults to 4 but if only one can come back, I would think it would present the one it gets..
I am sure others will know for sure...