reply to ¯\_(ツ)_/¯ breaks left arm

#### Describe the bug
In android it looks like this:

In web it works:

```
{
"type": "m.room.message",
"content": {
"msgtype": "m.text",
"body": "> <@kim:server> ¯\\_(ツ)_/¯\n\nreply to shrug",
"format": "org.matrix.custom.html",
"formatted_body": "

In reply to @kim:server
¯\\_(ツ)_/¯

reply to shrug",
"m.relates_to": {
"m.in_reply_to": {
"event_id": "$6fTiTAfENV5ODAlcjWOU6Dlnokn2M0ar_rq4HDD7Vvk"
}
}
}
}
```

I thought it might be a rich reply issue, but the `\\` arm looks properly escaped.

#### To Reproduce
Steps to reproduce the behavior:
1. Use element-web
2. send `/shrug`
3. reply to that message
4. look at message in android

#### Expected behavior
like web

#### Screenshots
see above

#### Smartphone (please complete the following information):
- Device: Moto G5S+
- OS: Android 10
#### Additional context
- App version and store 1.1.7 F-Droid (please host your own up2date repo)
- Homeserver: private