Problem with Comodo secure DNS blocking websites.

I am at present using the DNS Advantage servers due to the problems encountered in my link below which I first posted in the Comodo Dragon forum as I initially thought that was the problem. My question is if there has been a resolution to the problem I was having as being a fan of Comodo products I would prefer to use the Comodo Secure DNS servers again as soon as I know that they are stable?.
https://forums.comodo.com/help-cd/comodo-dragon-failing-to-open-sites-at-times-t79425.0.html