You are on Direct 3D 12 Beta have you tried turning that down?
Are you playing on steam or stand-alone launcher?
Also to note even if other people have made bug reports every persons configuration (hardware and software) ia most likely completely different and without data that is requested and provided in created abug report from the specific user(s) experiencing the problem it makes it more difficult for the devs to diagnose the potential issue(s).
Also im suprised Vsync and unlimited fps can be enabled at the same time since Vsync will limit your frames to that of your monitor refresh rate.