fix

app.go

@@ -516,7 +516,9 @@ func (a AppConfig) RefreshSnapshot() error {
 		refreshSnapshot[v.Box()] = struct{}{}
 	}
 	for _, v := range a.Destinations {
-		refreshSnapshot[v.Box()] = struct{}{}
+		if cfg.Box[v.Box()].online {
+			refreshSnapshot[v.Box()] = struct{}{}
+		}
 	}
 	for k, _ := range refreshSnapshot {
 		if *debugFlag {