REGRESSION: Delayed/Missing iOS Banners but Instant Badge Count (#2233) worsened in v12.9.1

[VishwaVidhatha-G]

Checklist

• I am reporting an issue in existing functionality that does not work as intended
• I've searched for existing GitHub issues

Description

Issue #2233 was closed as completed, but the latest v12.9.1 update has caused a severe regression. The issue is now worse. Telegram notifications fail to generate a visual Lock Screen banner, Notification Center banner, or sound alert entirely. Crucially, the application icon badge count still updates instantly and accurately the moment a message is sent. The background data payload arrives on the device without delay, but the iOS notification UI framework fails to render the associated visual/audio alert.

Expected Behavior

The application should trigger immediate visual banners, lock screen notifications, and audio alerts concurrently with the real-time update of the app icon badge count.

Actual Behavior

Visual banners, notification center updates, and sound alerts fail to generate completely. The background APNs payload lands on the device (as evidenced by the instant badge count update), but the local app layer fails to trigger the UI banner layer.

Steps to Reproduce

1. Receive an incoming Telegram message while the device is locked or the app is in the background.
2. Observe the application icon badge count incrementing perfectly in real-time.
3. Observe that no visual banner, lock screen notification, or audio alert is generated.

Screenshots and Videos

Remove, if not applicable

Environment

Device: iPhone 17

iOS version: 26.4.1

App version: 12.9.1