One thing you could try is setting the HUD scale to 100% in the vorpX menu, maybe that affects the chat window visiblity. Also using EdgePeek may be worth a try (sets the HUD scale to 100% automatically whle active).
In general: forums are usually primarily intended for user to user interaction. The vorpX forum is no exception in this regard. I try to answer as many questions as I possibly can here, but unfortunately don’t have an answer for every question.