Do you mean traffic getting dropped in firewall because of Checkpoint URLF failed to categorize the website?
In my case, URL's were categorized as Government/Military category in Checkpoint online DB but when I try to access with "Categorize HTTPS websites" enabled, its not allowing me to access. For testing we have changed option from Hold to Background under Checkpoint Online Services section, immediately it started responding. Basically it failed to categorize the site.
As the site uses self signed certificate but we have added root CA of those sites in our HTTPS inspection trusted CA but still issue remains same. Still CP is investigating on this one.