I was playing in the framerate priority mode on a 1440p monitor last night and I kept on getting controller disconnects. Apparently this can happen when an Xbox has a high workload. Anyway, I just started shooting at the second player when my controller disconnected, as in right when I shot the very first bullet, and the recoil/last input direction did the rest. So consider this a bug report and a highlight clip!
I switched back to my normal 1080p 60hz monitor and didn't have any issues after that. Has anyone else been getting controller disconnects in 1440p with the framerate priority mode on?