consistent disconnect handling

@@ -67,8 +67,7 @@ constructor(
 
     fun disconnect() {
         engine.close()
-        state = State.DISCONNECTED
-        listener?.onDisconnect(this, null)
+        handleDisconnect()
     }
 
     private fun handleParticipantDisconnect(sid: String, participant: RemoteParticipant) {
@@ -138,6 +137,11 @@ constructor(
         listener?.onActiveSpeakersChanged(speakers, this)
     }
 
+    private fun handleDisconnect() {
+        state = State.DISCONNECTED
+        listener?.onDisconnect(this, null)
+    }
+
     /**
      * @suppress
      */
@@ -240,7 +244,7 @@ constructor(
      */
     override fun onDisconnect(reason: String) {
         Timber.v { "engine did disconnect: $reason" }
-        listener?.onDisconnect(this, null)
+        handleDisconnect()
     }
 
     /**