According to HTTPS Inspection Enhancements in R77.30 and above , every first connection to a site is inspected even if it should have been bypassed according to the policy adn Probe bypass can resolve this issue.
The question is how much time it takes that next connection becomes the first again?
For instance, today I connected to a Financial services web-site and the first connection was inspected by the Check Point certificate, henceforth, next connection during today are not inspected. However, tomorrow the first connection will be inspected again. What are the time frames?