I’m not sure if this has already been stated, but halo reach runs significantly worse on xbox one on the digital version. With my friends I’ve played halo reach, my friends with the disc versions of the game play smoothly, me and my friend with the digital version run alot worse. Also when we record game clips it looks smooth on the clips. Also, is there a way to fix the digital versions? The patch a while ago didn’t help, and I’m sure this is old news but I’ve only just got back into halo.
I had this as an issue awhile back ago as well, however recently it fixed itself (I know, not a good helping point there). I would try however uninstalling and then reinstalling the game and see if that works; power-cycling your One also wouldn’t be a bad idea.
That’s peculiar I have the digital version of Reach and I have no frame rate issues. Though when any game acts up I always do a hard reset.