diff --git a/automation/src/main/java/info/nightscout/androidaps/plugins/general/automation/triggers/TriggerBTDevice.kt b/automation/src/main/java/info/nightscout/androidaps/plugins/general/automation/triggers/TriggerBTDevice.kt
index 02133d03d2..0a96be811b 100644
--- a/automation/src/main/java/info/nightscout/androidaps/plugins/general/automation/triggers/TriggerBTDevice.kt
+++ b/automation/src/main/java/info/nightscout/androidaps/plugins/general/automation/triggers/TriggerBTDevice.kt
@@ -86,7 +86,7 @@ class TriggerBTDevice(injector: HasAndroidInjector) : Trigger(injector) {
     }
 
     private fun eventExists(): Boolean {
-        automationPlugin.btConnects.forEach {
+        ArrayList(automationPlugin.btConnects).forEach {
             if (btDevice.value == it.deviceName) {
                 if (comparator.value == ComparatorConnect.Compare.ON_CONNECT && it.state == EventBTChange.Change.CONNECT) return true
                 if (comparator.value == ComparatorConnect.Compare.ON_DISCONNECT && it.state == EventBTChange.Change.DISCONNECT) return true