Moving from One Playlist to another in a schedule is not very clean right now. If the system can either pre-load the next playlist so that it behaves like a new clip, or hold a pre-defined slide so that the screen does not go black between changes.
We do plan to improve on the time it takes to switch from one Show to the next. Doing a preload on a Show-level, has some implications, but it could work.
In the mean time, you might be served by this feature:
Finally, due to the implementation, providing for smooth Shows transition would require this feature implemented first:
We are going to mark this as Accepted, but it will take some time till you see it released.