Jumping to search result fails, when that search result is in a thread.

### Steps to reproduce

1. search for content in a thread, in a room with threads, with threads enabled
2. click on the result
3. see "Failed to load timeline position
Tried to load a specific point in this room's timeline, but was unable to find it."

### Outcome

#### What did you expect?

search results should load

#### What happened instead?

nasty errrors

### Operating system

macos

### Application version

nightly

### How did you install the app?

nightly

### Homeserver

matrix.org

### Will you send logs?

No