First and foremost the usual Star Citizen disclaimer: The game is indeed abolutely unsupported because it is changing constantly.
Anyway, I’ll check it on occasion, but won’t make any promises at all. Can’t really think of any vorpX 18.3.0 change that might have caused that. Maybe some odd coincidence with a smaller game update.
What you can do yourself is renaming StarCitizen.exe to something else and then create a custom profile based on the existing one for this renamed .exe. That would allow you to check whether something can be done via shader authoring.