I think it is a bug. I have a rule which allows outgoing TCP connections to remote port 80 and 443 for HTTP/HTTPS.
But Little Snitch still asks for permission when i try to use YouTube.
After switching to "Alert Mode", a dialog pops up and asks for my decision. Then i allow the connection and add new rules
which are shown as duplicates in the configuration window. In my opinion, this is a bug. And a very annoying and embarrassing one.
Please fix it guys.