Popup notification for the same historical message each time I view the room in a fresh session

### Steps to reproduce

1. Open Element Desktop
2. Review rooms as normal
3. Eventually some time later open one specific room
4. See a notification for a (threaded, with mention) message from a month ago
5. This repeats each time I do these steps, it does not resend if I go out and back into the room within the same session.

### Outcome

#### What did you expect?

Messages should only ever notify me once, and ideally never if they are old messages.

#### What happened instead?

I am being repeatedly notified for the same message

### Operating system

Arch Linux

### Application version

Element Nightly version: 2025051601
Crypto version: Rust SDK 0.11.0 (f2e32d4), Vodozemac 0.9.0

### How did you install the app?

pacman

### Homeserver

half-shot.uk

### Will you send logs?

Yes