HALO CEA XBOX CONTROLLER AND KB PROBLEMS ON PC

I’ve recently gotten back on MCC after two weeks. I decided to work towards some Challenges for the Gold weapon skins. Start playing through the first mission and realized my controls on my controller was messed up. Checked to see if it was my controller and it wasn’t. Went to try my keyboard and that wasn’t working right. I kept playing and after the second mission, it was just a mess. First, my switching button, when I wanted to swap to my secondary, was either swapping to my secondary to my primary in a microsecond or it would take a solid sec to swap to my secondary. This was going on with switching to my grenades also. Next, I cant pick a weapon up what-so-ever. Finally, there will be times where I’ll hear a sound that isn’t supposed to be there. This was happening during the second mission. This is very worrying to me that after two weeks off being off, the game is broken. I’m not sure if there’s been a update? But, please look into this. Also, has anyone else experienced this? If not, could you please play the first couple of missions and see if this happens to you? Any other Halo works fine. I can easily play multiplayer. Thanks alot and I hope this is really looked into.

Update: The zoom in featured is also complete garbage now. It will not let me zoom in at all.

So multiple controllers and keyboard all had the same issue. I haven’t experienced that myself but it makes me wonder if there’s something going on in the background. We’re you in full screen? If you go windowed, does task manager show 100% cpu/GPU utilization?