Arma 3 full screen blanks out additional monitors

[Radioman 6]

On the first day of the alpha, Arma 3 allowed you to see what's on your secondary, tertiary, quadrary monitors, but in the latest update(?) which brought the startup option to start in either normal or windowed mode, starting in normal mode causes all other monitors to be blanked out.

This is not ideal as I use my multimonitors for a lot of things during gameplay, and it's stopping me from running in full screen and getting full performance out of my GPU. Not running in full screen disallows me to use NVIDIA adaptive vSync as well, which is a bit of a buzz kill.

Is this by design? Or did someone oops?

Thanks.

[Radioman 6]

I've worked out that if you're NOT running your windows theme as windows basic, then you'll have the screens blacked out. Running on basic theme allows you to see the screens again. Whyyyy.