Check if the user is already connected to the call.

src/Notifier.ts

@@ -59,6 +59,8 @@ import { VoiceBroadcastChunkEventType, VoiceBroadcastInfoEventType } from "./voi
 import { getSenderName } from "./utils/event/getSenderName";
 import { stripPlainReply } from "./utils/Reply";
 import { BackgroundAudio } from "./audio/BackgroundAudio";
+import { CallStore } from "./stores/CallStore";
+import { ElementCall } from "./models/Call";
 
 /*
  * Dispatches:
@@ -508,7 +510,13 @@ class NotifierClass {
         if (
             EventType.CallNotify === ev.getType() &&
             SettingsStore.getValue("feature_group_calls") &&
-            (ev.getAge() ?? 0) < 10000
+            (ev.getAge() ?? 0) < 10000 &&
+            !Array.from(CallStore.instance.connectedCalls).some(
+                (call) =>
+                    call instanceof ElementCall &&
+                    call.roomId === ev.getRoomId() &&
+                    call.session.callId === ev.getContent().call_id,
+            )
         ) {
             const content = ev.getContent();
             const roomId = ev.getRoomId();