Not familiar with the program, but if it is using an overlay it can cause weirdness depending on how you have XIV configured (windowed, borderless, full screen). A project that shall not be named had the same issues with XI back in the day. May be worth changing the games rendering mode to see if it behaves better so you have an idea of where to start focusing with your support ticket to them.

Otherwise, make sure the supporting engines it may run on are up to date as well (flash, java, .NET etc.). Sometimes these get overlooked, but can be an important piece to the puzzle.