Hi,
I'm using the latest build of openvr api from Actions tab, with OpenXR and Virtual Desktop (uevr dev release #681).
Game is Train Sim World 4 (UE 4.26), RTX 4070Ti with latest Nvidia driver.
Globally it works fine, there are some minor issues, but if trying to change the OpenXR rendering resolution factor from 1.000 in the uevr ui, the game crashes instantly with an UE crash.
It also crashes when exiting the game normally, but this one is not an a real issue since you were exiting the game anyway.