Lighting option lag?

Hey, so I just went on Steam like 15 minutes ago and noticed BeamNG updating, after loading the game I looked at the new vehicles and then new options menu. I was just messing around with some of the settings, and normally on BeamNG I would have to turn of dynamic lighting to get 60 fps, with it on I would get 25-30, but in the new update I was happy to see that I was getting around 60 fps with dynamic lighting on. I decided to turn my lighting quality down in the new options menu because it was slightly higher than the other settings, and after moving the slider slightly it froze for about 30 seconds. After unfreezing I suddenly was getting 30 fps, even after turning off dynamic lighting and putting the lighting setting back to where it was previously, I am still only getting 30 fps. So basically without changing any settings my fps has been halved... not sure why exactly.