The last issue I can think of is did you remove the .exe file from its file structure? If the executable is moved then drawing will break.
Ah I should have mentioned first that I was using a Samsung Odyssey+ (WMR) headset to launch the game. The headset is supposed work with SteamVR, but I wouldn't be surprised if its controllers handle a bit differently so perhaps it might not be compatible.
Aside from that though I didn't move the executable. I'll be sure to give it another go tomorrow to see if I can get the trigger working. Thank you for the help!