It's not an engine issue. It's an nvidia prime issue. Having just spent a day doing terrible things to my system to try to fix vsync in general, it now works just fine in this game.
325 days ago(+1)
What I mean is this should be able to be solved on the engine side too since the super speed on some things is caused by features the engine relies on not working right, but I am glad it is fixed for you now! Have fun!