telegramdesktop/tdesktop

Respect System Focus Mode option doesn't work on Windows 10

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#29478 opened on Jun 26, 2025

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bughelp wanted

Description

Steps to reproduce

  1. In Telegram Desktop, go to Settings - Notifications and Sounds, and enable the Respect System Focus Mode option
  2. Ensure that the Use Windows Notifications setting is off
  3. In Windows 10, go to Settings - System - Focus assist, and enable the automatic rule for When I'm duplicating my display
  4. Start a call in Teams, and start sharing your screen
  5. Make sure the focus assist is enabled
  6. Receive a new message in Telegram

Expected behaviour

The notification is suppressed

Actual behaviour

The notification is shown

Operating system

Windows 10

Version of Telegram Desktop

5.15.4 x64

Installation source

Static binary from official website

Crash ID

No response

Logs

Contributor guide

Tech stack
cpp
Domain
desktop
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
C++QtWindows notification system
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50
Research direction
Investigate the implementation of the 'Respect System Focus Mode' feature in the Windows notification handler. Check code in the `Telegram` or `Platform/Windows` directories for how system focus assist is queried. Look for any existing calls to `ShouldAppsUseToastNotification` or similar APIs. Also verify if there are version specific checks for Windows 10 that might be missing.