I was trying to solve the NO ESCAPE rune puzzle when I was returned to orbit for inactivity. My character wasn't standing still, I was moving and actively trying to solve the puzzle and the game was doing the countdown and teleporting me between the different rune platforms. Yes, I was taking a lot of time to understand it and doing it, but I was active, I wasn´t away from the game, you can check it, it was during my last play session. It was so frustating to be kicked out of the game that I just shutdown my Xbox. And after checking internet I realized that I have to start everything all over again because you at Bungie either don't grasp the concept of checkpoints or just refuse to implement them as every other game does. That alone makes me have zero motivation for returning to your game. How on hell your game system don't register that a player is actually playing the game and just kick him to orbit for inactivity? Not good, not good at all.