New message count not clearing in DM

### Steps to reproduce

1. In `!fNWlZfcPCJlXhYmaks:matrix.org`, received some messages yesterday. First message was a reply to one of my messages.
2. Navigate away, see message count still there
3. Every so often, unread message count in left panel goes red.
4. Look at the room, unread message count remains the same but goes grey.

### Outcome

#### What did you expect?
Unread count clears for good after I've read the room

#### What happened instead?
Unread message count in left panels is persistent. Issue present since yesterday afternoon.

### Operating system

_No response_

### Browser information

Chromium 115.0.5790.110 (Official Build) Arch Linux (64-bit)

### URL for webapp

develop.element.io

### Application version

_No response_

### Homeserver

Element version: d1f7b0898acc-react-ef385e6028ea-js-3a5d66057e4c Olm version: 3.2.14

### Will you send logs?

Yes