Screenshots don't work for my app

I'm trying to take screenshots for my submission to the store but the screenshot functionality doesn't work for my app. My app is currently in the system as a beta so I can open and play it on the Oculus go but when I try to take a screenshot it switches back to my app but I don't get the red dot that flashes for few seconds then takes my screenshot. It still works in other apps but just not in mine. Strangely, video does seem to work, or at least the red dot appears in the app. I'm not seeing any resulting video anywhere, should that show up in the gallery?