It seems that quite often the connective issues happen when the play.octowow.st domain resolves to 92.114.107.0/24.
Using 185.246.188.177 directly in realmlist.wtf / WTF/Config.wtf works fine, I'd be warry on connecting to some random login server but play.octowow.st has been often resolving to 185.246.188.177.