Changes to graphics settings do not persist when using vulkan

[BlastFM]

When selecting vulkan as the rendering backend, graphics settings will reset on reboot.
In addition, if vulkan is enabled by using the -vulkan launch option, the in-game setting will show -dx11 as selected, gray out the selection box and still reset the graphics settings upon rebooting. Is vulkan actually implemented?

My "workaround" for resetting video settings - use dx11