Hey so I’m having an issue when streaming MCC on OBS Studio. When I play MCC without streaming it plays perfectly fine, but there’s an issue with OBS even if i’m not live. Basically let’s say I boot up the game, I alt + tab or press windows key to check something on OBS (whether i’m live or not, like OBS could be just open) or to check chrome or whatever. I click back to my main monitor where Halo is running and it will still work fine but the second I press esc or windows key again everything just crashes and both my monitors go black. Once everything crashes and the monitors go black the fans in my PC ramp up super high and I can still hear music or whatever was playing in the background before the crash but I just can’t see anything regardless of what I press on my keyboard so I’m forced to shut down my PC with the actual on/off button. Has this happened to anyone? Is there a fix? I’m running OBS in administrator mode, game mode is on, I’m playing on fullscreen and not borderless or whatever, MCC is allowed to run and whatnot through firewall so I don’t think firewall is the issue. I’ve never had this issue with my old PC, the new specs i’m currently running are a Ryzen 7 3700x, 2070 Super, x570 mobo, 16gb ram.
I’ve been having a similar issue. Sometimes when I alt+tab the game will crash but in a similar fashion. My screens go black and an error comes up saying something about UE4 crashing. The game stays open however but I can’t see anything. I can actually still play the game this way, I can hear perfectly fine, shoot my gun, walk around but just can see any of it. If I press ESC I can see the MCC cursor appear like it normally would on the menus. I’ve sat like this until the end of a firefight match and when it ends the game properly crashes, as if it can’t go back to the main menu.
This happens about a third of the time I alt+tab and it doesn’t matter if the game is fullscreen or borderless. It’s getting really frustrating as I can’t reply to messages on discord without the fear of a crash.
Hopefully this thread gets seen and it can be sorted.
As this appears to be an issue with your game, we recommend heading over to https://aka.ms/HaloSupport for further assistance. Please review the latest known issues and submit a ticket if your issue is not listed. The best way to get issues noted and fixed is by filing bug reports 
Thanks!