While I am sequence mode, periodically when I put a Scene Online, it will display the words "Preparing" in the State column. It will display "Preparing" for about 5-8 seconds but then never puts my scene online. I must then put my desired scene online again, on the second attempt it works normally. In my mind, Xpression is slowing causing it to prepare the scene. what is causing Xpression to display "Preparing" status?