On my machine, if I alt-tab out of either Assassin’s Creed Odyssey or Assassin’s Creed Origins, vorpx will hang every time. What’s weird is that the game continues to be playable, but the headset shows a little window containing the title of the game and a pause symbol. Does this happen for other people?
(I noticed another weird thing with both of these titles. Perhaps, it’s related. After I quit either game while running vorpx, Steam thinks the game still running. To get it to recognize that the game is no longer running, I have to also quit SteamVR. I suspect it has something to do with Ubisoft’s cloud syncing, because immediately after I close SteamVR, a window briefly pops up saying it’s synchronizing my achievements with Ubisoft.)