Rich Text Editor: doesn't load event to edit

### Steps to reproduce

Send the below event (via another client):
```
{
"type" : "m.room.message",
"content" : {
"body" : ":)\n\nThere's still a lot of them if you scroll down tho, or my client is not previewing their replies ",
"msgtype" : "m.text",
"format" : "org.matrix.custom.html",
"formatted_body" : "

:)<\/p>\n

There's still a lot of them if you scroll down tho, or my client is not previewing their replies<\/p>"
},
"origin_server_ts" : 0
}
```

Try to edit on Element iOS via the new editor

### Outcome

#### What did you expect?

Being able to edit

#### What happened instead?

An empty text editor, with no information

### Your phone model

iPhone Pro Max 13

### Operating system version

16.4.1 (a)

### Application version

1.10.11

### Homeserver

Synapse 1.77.0

### Will you send logs?

Yes