diff --git a/numass-control/src/main/kotlin/inr/numass/control/DeviceDisplayFX.kt b/numass-control/src/main/kotlin/inr/numass/control/DeviceDisplayFX.kt
index 9d5f6b9..4c10691 100644
--- a/numass-control/src/main/kotlin/inr/numass/control/DeviceDisplayFX.kt
+++ b/numass-control/src/main/kotlin/inr/numass/control/DeviceDisplayFX.kt
@@ -78,13 +78,13 @@ abstract class DeviceDisplayFX<D : Device> : Component(), Connection {
     protected abstract fun buildView(device: D): UIComponent?;
 
     fun valueStateProperty(stateName: String): ObjectProperty<Value> {
-        val state: ValueState = device.states.filterIsInstance(ValueState::class.java).find { it.name == stateName }
+        val state: ValueState = device.states.filterIsInstance<ValueState>().find { it.name == stateName }
                 ?: throw NameNotFoundException("State with name $stateName not found")
         return state.asProperty()
     }
 
     fun booleanStateProperty(stateName: String): BooleanProperty {
-        val state: ValueState = device.states.filterIsInstance(ValueState::class.java).find { it.name == stateName }
+        val state: ValueState = device.states.filterIsInstance<ValueState>().find { it.name == stateName }
                 ?: throw NameNotFoundException("State with name $stateName not found")
         return state.asBooleanProperty()
     }
diff --git a/numass-control/src/main/kotlin/inr/numass/control/FXExtensions.kt b/numass-control/src/main/kotlin/inr/numass/control/FXExtensions.kt
index 836c11f..c39312a 100644
--- a/numass-control/src/main/kotlin/inr/numass/control/FXExtensions.kt
+++ b/numass-control/src/main/kotlin/inr/numass/control/FXExtensions.kt
@@ -112,15 +112,17 @@ fun EventTarget.deviceStateIndicator(connection: DeviceDisplayFX<*>, state: Stri
 fun Node.deviceStateToggle(connection: DeviceDisplayFX<*>, state: String, title: String = state) {
     if (connection.device.stateNames.contains(state)) {
         togglebutton(title) {
-            isSelected = false
             selectedProperty().addListener { _, oldValue, newValue ->
                 if (oldValue != newValue) {
                     connection.device.states[state] = newValue
                 }
             }
-            connection.valueStateProperty(state).onChange {
-                runLater {
-                    isSelected = it?.boolean ?: false
+            connection.valueStateProperty(state).apply {
+                isSelected = value?.boolean ?: false
+                onChange {
+                    runLater {
+                        isSelected = it?.boolean ?: false
+                    }
                 }
             }
         }
diff --git a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacCollectorDevice.kt b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacCollectorDevice.kt
index 41d287a..d2cbce2 100644
--- a/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacCollectorDevice.kt
+++ b/numass-control/vac/src/main/kotlin/inr/numass/control/readvac/VacCollectorDevice.kt
@@ -47,6 +47,10 @@ class VacCollectorDevice(context: Context, meta: Meta, val sensors: Collection<S
 
     private val helper = StorageHelper(this, this::buildLoader)
 
+    init {
+        states["storing"] = true
+    }
+
     private val collector = object : DeviceListener {
         val averagingDuration: Duration = Duration.parse(meta.getString("averagingDuration", "PT30S"))