Are you sure you are on the latest firmware? The latest is 073.040.086.15410.
Since it appears to be a DNS issue, just set the DNS to static, make the Primary DNS the same IP as your gateway(router) and set the secondary as 8.8.8.8.
There certainly is no issue with Connectkey firmware that has occurred since 2014 so it is either the weirdest hardware failure in a network controller I've come across, or something odd in your setup.