Ubuntu/Gnome, after fresh boot (with element starting), application shortcut launches new, not open existing

### Steps to reproduce

1. Reboot (or equivalent)
2. Click on "Element" shortcut on application side-bar
3. Second instance of Element launches, instead of "restoring" the Element that started with boot (that is minimised by default)

### Outcome

#### What did you expect?
I expect the existing Element to launch, instead of a second instance

#### What happened instead?
A second instance launched, and it of course asked for my login credentials (since this is a second instance)

### Operating system

Ubuntu 20.04

### Application version

Element version: 1.10.6 Olm version: 3.2.8

### How did you install the app?

From the Element repo, as per the main website set up steps

### Homeserver

Default matrix server, public

### Will you send logs?

No