After NVIDIA updated their beta Vulkan drivers recently, it came with a pretty big issue they've now corrected.
On November 28th, NVIDIA moved this special driver over from the 396 driver series to the much newer 415 series. This added in Turing support (the 2080 etc) along with supporting new Vulkan extensions and bug fixes for the VK_EXT_transform_feedback extension.
Sadly, it broke Unity games when run in Wine for things like Steam Play. Considering this is the only driver from NVIDIA that supports the transform feedback extension (helps DXVK) it was a big issue.
This is now corrected with the new 415.18.04 driver released on the 2nd of December, which also adds in support for the VK_KHR_shader_float16_int8 and VK_KHR_shader_float_controls extensions.
See more here.