This occurs when you have a weapon drawn and jump while sprinting, as well as occurring for many weapons when performing a sprinting attack. The entire screen flashes for a split second in what almost looks like an FoV change. It's pretty disorienting and fairly awful to look at, can be a bit disruptive to gameplay too if you're the kind of person to use a lot of sprinting attacks. I've found that this is caused by SmoothCam. Disabling SmoothCam gets rid of this issue. However, naturally, one likely would want to keep SmoothCam. As such, I and some others found that a recent, previous version of SmoothCam (1.5) does not have this issue while installed in the list.
This occurs when you have a weapon drawn and jump while sprinting, as well as occurring for many weapons when performing a sprinting attack. The entire screen flashes for a split second in what almost looks like an FoV change. It's pretty disorienting and fairly awful to look at, can be a bit disruptive to gameplay too if you're the kind of person to use a lot of sprinting attacks. I've found that this is caused by SmoothCam. Disabling SmoothCam gets rid of this issue. However, naturally, one likely would want to keep SmoothCam. As such, I and some others found that a recent, previous version of SmoothCam (1.5) does not have this issue while installed in the list.