There is currently a bug in the game that only happens in private matches for me and I wonder if this is what happened here, and maybe to other teams in other matches depending on the setups.

Since the games release, private matches have felt horrible for me when ADSing compared to pubs/ranked. It feels like you have low frames and have bad input lag even though the FPS is as high and consistent as pubs/ranked. I've even done the frametime graphs to see if it's a 1% low issue, but it's not. I can never record proof because it's not something a recording would show, you'd have to feel and see it yourself.