Scrolling in the main timeline while keeping a thread with a mention open increases the notification count

[robintown]

Steps to reproduce

1. Clear all your notifications in a room
2. Open a thread in that room where you were previously mentioned and notified
3. Scroll backwards through the main timeline of the room

Outcome

What did you expect?

The notification count should stay at zero

What happened instead?

The room gets a red badge, and the notification count for the room seems to increase by 1 for every new event loaded into the main timeline

Operating system

NixOS unstable

Browser information

Firefox 106.0.2

URL for webapp

develop.element.io

Application version

Element version: 65b8bc1-react-36a574a14fa7-js-6c543382e665 Olm version: 3.2.12

Homeserver

Synapse 1.70.1

Will you send logs?

No

[germain-gg]

I have been unable to reproduce with the steps you gave, there must be other forces at play that I have not figured out yet, but I have a PR up that could make this a tiny bit better, matrix-org/matrix-js-sdk#2862

Would you be able to check the Netlify build at some point?

[robintown]

Fixed by matrix-org/matrix-js-sdk#2862