Other person's video is on top of QR code while trying to crossign during videocall

### Steps to reproduce

1. Video call
2. login to a new session on another phone
3. start verification

### Outcome

#### What did you expect?
able to scan qr code

#### What happened instead?
unable to scan

### Your phone model

moto e5

### Operating system version

8

### Application version and app store

1.3.6 (G-b4127)

### Homeserver

private

### Will you send logs?

No