FortiGate AntiVirus Proxy-Based FTPs issue

[zoriax]

Hello

I activated AV in WAN to LAN in Proxy-Based mode. When I tried to reach an FTPs server, my connect failed... If I disabled AV in rule all works fine.

Nothing blocked in log (all is logged and I can see the allow log in FortiGate). But that's strange because the "result" is empty. Like there is no traffic... 

Here my AV config

What is this behaviour and why my queries is "blocked" without any apparent reason and now explicit logs ? 

[zoriax]

The non working logs are on my previous post :) and the working logs are on my last post