Read checkmark in forum topics is not shown

[danog]

Steps to reproduce

1. Send message to forum topic
2. Wait for it to be read (double checkmark)
3. Switch to another chat (not another topic, another chat)

Expected behaviour

The sent message in the dialog list should have a double checkmark

Actual behaviour

The sent message in the dialog list has a single checkmark

Operating system

Arch linux

Version of Telegram Desktop

6.3.1

Installation source

Other (unofficial) source

Crash ID

No response

Logs