When I Facebook login, chat is connecting few seconds, then shows friends list and after one moment shows that Chat is not available. Reproducible: Always
Sorry, I'm not a facebook user, but my wife and my daughter usually chat there. They are not using the webapp mode, anyway. Can you please test it also in the normal rekonq window?
Created attachment 81165 [details] I think, that this file can help. I used strace.
Development on Rekonq ceased four years ago, and it has been unmaintained since then. KDE recommends using Falkon instead.