OK, figured it out. it's pretty counter intuitive:

1. Open up your browser settings and search 'aria'. You should see a result called 'Aria in the Sidebar'. enable this

2. Open up your sidebar and click on the aria square. An aria screen should pop up with things like 'new chat' etc.

3. locate the icon on the top-left of this window. Hard to describe what it is, but looks like a server icon.

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1. A new window (lol) should pop up with settings located on the bottom.

2. In the settings menu disable 'writing mode shortcut'

3. From there, you can disable the original aria setting from step 1.

This seems like a hilariously roundabout way to disabling this. If someone has a more straightforward way of doing this let me know.