Block Unknown countries if enabled under Geo-IP is causing sudden services/connections failures/drops

We Have recently come across issue that prevents users to access any connection across the Firewall if they have Unknown countries enabled under Geo-IP Filter. 

Geo-IP is resolving the IPs to "Unknown" location.

We are aware on the issue and working on same to resolve it. 

For the time-being please Uncheck  "Block all Unknown countries" under Geo-IP Filter.