fix that broken logic

tunnel/default.go

@@ -519,12 +519,14 @@ func (t *tun) listen(link *link) {
 			// assuming there's a channel and session
 			// try get the dialing socket
 			s, exists := t.getSession(channel, sessionId)
-			if exists && s.mode == Unicast && !loopback {
+			if exists && !loopback {
+				if s.mode == Unicast {
 					// only delete this if its unicast
 					// but not if its a loopback conn
 					t.delSession(channel, sessionId)
 					continue
 				}
+			}
 			// otherwise its a session mapping of sorts
 		case "keepalive":
 			log.Debugf("Tunnel link %s received keepalive", link.Remote())