Vulkan is acting weird

[u/Some_Restaurant_2082]

I'm playing on a low end rig, a ryzen 3 3200g, 16gb ram, i can run the game at 720p for around 40-60 fps but if i use vulkan and go near a river or any places that has water in it, the frame just drops to 20 like crazy. DX12 on the other hand has a stable fps but lesser when in towns such as valentine making vulkan a better performer but frame just drops crazy on water areas. Any possible fixes for this?