[QUESTION] UNKNOWN -100 (not a bug report)

[kohanla]

I noticed that the log shows a lot of UNKNOWN -100 in the logs. And I figured out that most of the log entries originate from a few apps.

For example Telegram is allowed to connect to the internet (lan, mlan, wlan). But why is it being blocked by rule UNKNOWN? It seems like that Telegram does not connect "directly" to the internet in some cases (always to a destination with port 443)? How does it work?

PS

I installed the donate version, but I assume this applies to the other versions as well?