This problem as be occurs for how long already? Sadly Zone Lab are barely alive to solve this issue, people love their firewall, but they seem to work to solve issues like a slug. If your not having problems, then you should be okay, If you are using ZoneAlarm Pro, disable Cookie and Privacy controls cause you only need the firewall and that's it. For now if you are not receiving any problems, you are fine for now, if any problem rise, you may use the forum for solving the issue.