Desktop mirror is broken

[poppadom42]

Changing the mirror option in-game doesn't change the actual desktop mirror.

I first booted it up with mirror off and found that it wouldn't turn on when changing the setting.
I then selected third person, then reopened the game. When I loaded into a world and went to check my desktop mirror, it was stuck on the loading screen still.
This is when I did some searching online for any other reports of this and then when I went back to check the mirror, it was completely black.

When on the third person option in-game, the camera model and the view next to it was rendering as expected. Just not the what was shown on my desktop.

[poppadom42]

update: after doing some more messing around, I've found that the mirror works fine within the menu when first booted up and only stops working after loading into a world.
Going back to the main menu after being in a world doesn't fix the mirror and is still broken then. It seems that once a world has loaded, the desktop mirror breaks altogether.

[poppadom42]

FIX: I had internal shaders turned on and turning it off fixed it.