Problem with blocked application

From time to time I like running grc’s leaktest just to see if the firewall is doing its job, it seems since the last update I can’t seem to block this application through the new blocked application section. I’ve did a search on the forums regarding this issue and have tried the various fixes suggested. The only way I got the block to work was to actually put in the IP of the leaktest server in my blocked network zones, but that only works when you know the IP is static correct?

xphome sp2
cfp V3.0.25.378