Segmentation fault when using paprefs to output two devices

## Prerequisites
- [x] I have searched open and closed issues for duplicates.

## Describe the bug
I followed [this tutorial](https://askubuntu.com/a/78179/903362) so I can play my audio on both plugged in headphones and a paired bluetooth earphone simultaneously. However, opening Sound Settings closes it immediately.


After opening `io.elementary.switchboard` in the Terminal to see what was going on, the only thing I get is a `Segmentation fault` after it crashes.

### To Reproduce
Steps to reproduce the behavior:
1. `sudo apt install paprefs `
2. `sudo apt install pavucontrol `
3. Reboot
4. Open Sound settings

### Expected behavior

It should list the virtual device in the sound output list.

## Platform Information

- [ ] I'm using the latest version from git that I've manually compiled
- [x] I'm using the latest released stable version

## Additional context

After unchecking the option to output to all devices, the issue doesn't occur. So it's probably got something to do with the Switchboard plugin listing the virtual output device because aside from the Sound settings crashing, the setup is working as it should and I can hear the audio on both bluetooth and plugged in headphones.