Telegram Loads Entire Chat History on Launch, Causing Lag

[rom-19]

Checklist

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

Description

The Telegram app attempts to load the entire chat history when opened. If you’re a member of an active group and haven’t used Telegram for a while—or if you open Telegram on another device—it tries to load all messages instead of just the recent ones. The app remains unusable until the full message history is loaded. This behavior was not present in older versions, which used to load only recent messages.

Expected Behavior

The app should load only recent chat history.

Actual Behavior

The app tries to load the entire chat history, making it unusable until the loading process is complete.

Steps to Reproduce

1. Receive a large number of messages from a user or group while not using Telegram
2. Open the app
3. The app attempts to load every single message chronologically

Environment

Device: `iPhone 13 Pro, iPad Pro 2022’

iOS version: iOS 18.4, iPadOS 18.4

App version: 11.9