Game DVR in halo 5 not working!

well recording last 30 seconds and saving screenshots works fine but i wanted to record a slayer match for my (deaf) friend and the game dvr just showed up as a gray surface everytime i tried , so much for wanting to record 5 minutes straight in theater!

This happened to me a couple times but it appeared after a minute. I think the latest update fudged a thing or two up.