unread message indicator sync problems when using multiple instances of the client

[ask-compu]

Describe the bug

when using multiple instances of the client (ie laptop and desktop) reading all unread messages on one client doesn't make the unread message indicator disappear until the user switches chats

Reproduction

No response

Expected behavior

No response

Platform and versions

OS: Kubuntu 22.04
Browser: Google Chrome 120.0.6099.129
Pony House Version: 1.3.28
Matrix Homeserver: filly.chat

Additional context

No response