Only send callEndedEvent if the user has joined the call.

src/analytics/PosthogEvents.ts

@@ -27,8 +27,8 @@ interface CallEnded extends IPosthogEvent {
 }
 
 export class CallEndedTracker {
-  private cache: { startTime: Date; maxParticipantsCount: number } = {
+  private cache: { startTime?: Date; maxParticipantsCount: number } = {
-    startTime: new Date(0),
+    startTime: undefined,
     maxParticipantsCount: 0,
   };
 
@@ -49,6 +49,7 @@ export class CallEndedTracker {
     sendInstantly: boolean,
     rtcSession: MatrixRTCSession,
   ): void {
+    if (this.cache.startTime) {
       PosthogAnalytics.instance.trackEvent<CallEnded>(
         {
           eventName: "CallEnded",
@@ -69,6 +70,11 @@ export class CallEndedTracker {
         },
         { send_instantly: sendInstantly },
       );
+    } else {
+      logger.warn(
+        "[PosthogEvents] Failed to send posthog callEnded event due to missing startTime",
+      );
+    }
   }
 }