When we noticed a delay, the first thing we check is the Screen Resolution you are using. Follow this article to make sure you are running at a good resolution. https://support.mediashout.com/808569-Setting-Up-Screens-in-MediaShout-Version-6-Windows--Mac
We recommend building a new script from scratch at least once a month. If you don't do this, the probability of something getting carried over is pretty high. We have seen this cause issues in the past so we want to make sure to build a new script every so often.
I hope this helps!