Sounds like a false negative, but the forum is not the right place to troubleshoot this. Please open a Support case. You will be asked to provide the exploit PoC, a packet capture of the attack (capture it from the client side) and supporting evidence that SSL decryption is working properly (detailed traffic log view showing the decrypted application normally detected and readable by the firewall).
Click Accept as Solution to acknowledge that the answer to your question has been provided.
The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!
These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!
The LIVEcommunity thanks you for your participation!