I did actually double check that as I did run the game in Vulkan before. However I switched back and checked again.
I guess something in my system configuration just keeps messing with vorpX. The only game I have been able to get running with it so far was Bioshock Infinite.
Other games (even the supported ones) either outright crashed, had extreme graphical glitches or ran with extreme low fps.
Well it was worth a try.