[iOS] trigger() not sending events while working on Android

[sheraz-tdtrg]

Describe the bug
When using pusher_channels_flutter, triggering a client event from iOS does not work.

• On Android, events are triggered and received correctly.
• On iOS, the trigger() call succeeds (no error thrown), but the event is never received by any clients (neither iOS nor Android).

To Reproduce

Steps to reproduce the behavior:

1. Initialize Pusher with private channel + client events
2. Subscribe successfully (both Android and iOS receive messages if triggered from server/Android)
3. Call pusher.trigger() from iOS
4. Event is not received on any client

Expected behavior
Calling trigger() from iOS should send a client-* event to other subscribed clients (same as Android behavior).

Code Sample
await pusher.trigger(
PusherEvent(
channelName: "private-chat-23",
eventName: "client-message",
data: jsonEncode({
"username": "James",
"message": "Hello",
"timestamp": "08:36 PM",
}),
),
);