Clicking "Reply to a thread" on a reply referencing a thread root shows "Failed to load timeline position"

### Steps to reproduce

1. Post message A
2. Open a thread on message A and post message B
3. Reply to message A and post message C
4. Click on "Reply in thread" on message C

### Outcome

#### What did you expect?
* [x] A new empty thread view because message C has no thread associated.
* [ ] No error

#### What happened instead?

[Peek 2024-05-10 11-58.webm](https://github.com/element-hq/element-web/assets/10872136/ac1efaea-f32b-426e-ba0f-02a546d535ce)

### Operating system

Manjaro Linux (based on the Arch repo btw)

### Browser information

Mozilla Firefox 125.0.1

### URL for webapp

app.element.io

### Application version

Element version: 1.11.66 Crypto version: Rust SDK 0.7.0 (61b175b), Vodozemac 0.5.1

### Homeserver

matrix.org

### Will you send logs?

Yes