I thought I was going crazy, because I've also been having this issue. In my case, it's the LT button that's not working. The RT button works okay, but LT not at all. I also have a controller that can switch modes from Xinput to D3, and when I switch to that, the game does read my LT presses, although inconsistently, but my other buttons are messed up, as per what I've seen people complain about with Playstation controllers in general. It seems this update as a whole has had significant issues with controllers on PC in general. Posting here bothj to watch the thread and confirm you are not the only person with this issue. I also had no luck with email support, either.