My Element settings seem to have reset over the last few days

### Steps to reproduce

Unsure of reproduction steps. I was first tipped off when my custom notification sound (`notificationSound`) had changed back to the default, and then when inspecting the settings of Element through the devtools, it's mostly blank:

```json5
{
"type": "im.vector.web.settings",
"content": {
"releaseAnnouncementData": {
"newNotificationSounds": true,
"newRoomList_intro": true,
"newRoomList_sort": true,
"newRoomList_filter": true,
"newRoomList_settings": true
},
"MessageComposerInput.insertTrailingColon": true,
"SpotlightSearch.recentSearches": [
// A set of rooms
]
}
}
```

### Outcome

#### What did you expect?

My settings not to reset.

#### What happened instead?

My settings reset.

### Operating system

Arch Linux

### Application version

Element Nightly version: 2025101801 Crypto version: Rust SDK 0.14.0 (c3b7918), Vodozemac 0.9.0

### How did you install the app?

Arch AUR

### Homeserver

half-shot.uk

### Will you send logs?

Yes